PDF malware analysis — malicious · 772db97a18e4a948

MALICIOUS

PDF

50.2 KB Created: 2020-10-26 17:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: 92af4523d94aad653fe8f6200aedff72 SHA-1: 2870948587e8e322a93aedf89826e95380e8c75b SHA-256: 772db97a18e4a9484f4ad3ed1040f7e6127e2f15cdc4a52cee2d6f8bbfa3bc69

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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://ggtraff.ru/123?keyword=mod+launcher+apk+download In PDF document text
- https://lugagixoweliw.weebly.com/uploads/1/3/4/2/134234548/lezaf.pdfIn PDF document text
- https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/35c7b0b85c991.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369143/normal_5f87bf9741ed6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366341/normal_5f8735f27c039.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366346/normal_5f8d5daa0fdcf.pdfIn PDF document text
- https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/fb2aa3f.pdfIn PDF document text
- https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/vakotivim.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369630/normal_5f8e049518b24.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366304/normal_5f872aa16ecbf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365570/normal_5f87e4668ee7e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390329/normal_5f95d4d1b007f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373519/normal_5f8f8af578ee5.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/1/0503/8650/1806/files/ipl_2020_schedule_sunrisers_hyderabad_team.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/4025/9251/files/7987670919.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0492/0134/8774/files/35498133426.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/1827/0905/files/62120451258.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/0981/3923/files/21594487218.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/6729/9782/files/bafuk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/5199/8101/files/partitive_proportion_word_problems_worksheet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/5996/0744/files/44377692022.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000062ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62EC	5144 bytes
SHA-256: `2788597d889f2c0b2bab5eed9db6d4ae4cb7bffe788878b4bc1967e38bd98a54`
`font_01_sfnt_off00007470.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7470	2276 bytes
SHA-256: `466a24d7caaef1e1ad2865606ab3524efdda8593c3150e38c474fe2a67759f6f`
`font_02_sfnt_off00007eb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EB6	11640 bytes
SHA-256: `5d0dd2c9f75cf55ffecd6de27cb868ad6ad4c44a0e094e379f6b70827ce45f74`
`font_03_sfnt_off0000a632.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA632	16088 bytes
SHA-256: `b8c2fde348fb5137a33a2ba73beef8eb910e6cbecf0fd5337b6ab0e2d2c5a18c`

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