PDF malware analysis — malicious · 539d52257dbcbf5b

MALICIOUS

PDF

48.2 KB Created: 2020-10-20 10:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 35601d317216c123ef4b521579a33f02 SHA-1: 311c1bb3ca402ac980f7a17240af721badf444a2 SHA-256: 539d52257dbcbf5b8f82095d0dccff36dce99e2b45fb5cec59c05f4ffac94acc

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm. The embedded URLs, particularly the one pointing to 'ttraff.cc', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://ttraff.cc/123?keyword=hollow+knight+endings+guide+no+spoilers In PDF document text
- https://cdn-cms.f-static.net/uploads/4379374/normal_5f8dca0da5e5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370097/normal_5f8881bf2ec90.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368756/normal_5f88c35689d4c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390052/normal_5f8e3dcf5b724.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374372/normal_5f8937432c525.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368227/normal_5f8762f4bfa97.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/85839387-f8ce-4211-8cfc-55168bdc3ec4/85779798285.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16996089-db33-4946-9603-ff28f0b0a54f/70002212324.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1bd93159-f16a-40b5-9cc8-d81b424edfdb/dijozezuzoxaz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec8deacb-ad6f-4701-8e95-9ab044b59042/bitaworakilamo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/2441/2572/files/58364666491.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7160/1817/files/scooter_across_america.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/3601/5267/files/deemo_ios_android.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7fea21de-7c03-42f1-8481-ba4ee9f4a194/38850729714.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1b3feef6-d396-4e17-b3f1-e1f55098728b/58630602321.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/640effb8-8d15-4e72-9d2f-60316164cbc8/suxazigazewoxu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b4c06e0-1946-4369-807a-d5576584db79/tusus.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/98b73c3f-0253-41d3-89c9-02068caa914f/jogemodewitapa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a8e99659-ef74-4c42-ab9d-b0843abbf95d/worilasibodobesilu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/45a0cac0-21f4-45b2-8fcd-bc37dbd84b5f/putomovudadib.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f28fdad8-3700-4372-a34c-e7d6052f3b50/kejabilubol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/67257e1e-0dcb-4472-a9d9-641b7ce7cea2/xolejotupezoji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e694eefa-1071-4fc1-81c0-fc685f49f440/hp_1606_drivers.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000070b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70B1	3352 bytes
SHA-256: `15254d9bc15d4a81b25b50bcba715fb388e70931cb6e870922b7ab60b3c07ac7`
`font_01_sfnt_off00007cb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CB1	5128 bytes
SHA-256: `bbdeaba5136700c45b83538d8e9d492b089ab9c4f294f3385a6bbd9ea0c85ffa`
`font_02_sfnt_off00008e2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E2D	10256 bytes
SHA-256: `f521f83fa2fc3f07c42f25f88b5d7f247992d80b9c5b38bcd99056a2daaa7835`

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