PDF malware analysis — malicious · 3fe65dcfcf5860cb

MALICIOUS

PDF

49.8 KB Created: 2020-10-17 20:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 550f16d6630cc47f449d24b1ee1ac812 SHA-1: e475e8579cf9d41813405598d00382553164d4fb SHA-256: 3fe65dcfcf5860cb9c7f73b6988f685a55f01d64037f130b870f04935e796fa7

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, disguised with keywords related to 'Kingsoft writer pdf'. This indicates a phishing attempt to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://gettraff.ru/123?keyword=kingsoft+writer+pdf+%25E7%2594%25BB%25E5%2583%258F In PDF document text
- https://cdn-cms.f-static.net/uploads/4366336/normal_5f873faf0022f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368486/normal_5f896a86d5cb8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367960/normal_5f88f249b5315.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365563/normal_5f87540ed46b4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368486/normal_5f882ca0ee1c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379733/normal_5f8af452ed71b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377414/normal_5f8b0816abb3b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374022/normal_5f8a9ed435837.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378393/normal_5f8a7d2f1850a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369330/normal_5f890427a446d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373983/normal_5f8b143180a93.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367278/normal_5f8763927f5a3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369771/normal_5f87d79d40ad4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370052/normal_5f88cd6ec5c72.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371025/normal_5f8a084a6f3f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369905/normal_5f88f9d97b761.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367925/normal_5f88470925d14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366003/normal_5f8b1e912c39d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366993/normal_5f87d4e2d4b50.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/7390/4545/files/23352900445.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/4609/9866/files/southeastern_five-lined_skink_care.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/4537/5128/files/zivafulodamitubu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c803f909-3738-44c8-a480-0b2485f3140b/sezobozabizoguk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7d06582d-53aa-42cb-9e9b-cb904c9689f3/muwadu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9392538a-bea9-40d6-b14f-015ca3fbf625/degoxik.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000062f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62F4	5616 bytes
SHA-256: `cd7247de31376f651316e8bf69db18beb9a71b75cf9e44cd426020687a8282ec`
`font_01_sfnt_off000075f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75F9	3492 bytes
SHA-256: `7be669c7763c7a95b2b228503d13e3305d8be2a7f64a11e57e5511fa0d3351c3`
`font_02_sfnt_off0000824e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x824E	5028 bytes
SHA-256: `def329fba9fa00a5843f783ef3019e83b6e104e4d3d3ffb283d695cf372e6ecb`
`font_03_sfnt_off0000938f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x938F	10436 bytes
SHA-256: `feb95a934bdefdbe6ef4be38c001704a890ef06f888da73400652f3e5de1eb15`

Open this report in the interactive analyzer, or submit your own file for analysis.