PDF malware analysis — malicious · c59c35e135279f7c

MALICIOUS

PDF

33.3 KB Created: 2020-09-05 08:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 398412570e03e2b6ac798de383b8a386 SHA-1: c21007d64bdd445775bbc06d37b9f16591f8b327 SHA-256: c59c35e135279f7c5e060ff1f71521ba45e6177dc8cd37b3dab06b5eebb4eb8c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'Age of Empires mobile game' and the malicious URL, suggesting a lure for users to click the link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=age+of+empires+mobile+game
- https://static.usrfiles.com/ugd/20d83a_0f0a8b318b9442bf8f07517fa79837bc.pdf
- https://static.usrfiles.com/ugd/7182f3_05be24f0c34c47528e908f14496a3e8a.pdf
- https://static.usrfiles.com/ugd/fb41f9_f34db936cd3241dfa92bca46303a0657.pdf
- https://static.usrfiles.com/ugd/451461_900432f556954b6da27b597810506e58.pdf
- https://cdn.shopify.com/s/files/1/0431/6856/3355/files/belgrade_serbia_tourist_guide.pdf
- https://cdn.shopify.com/s/files/1/0431/8072/0294/files/titujipirakurivibedaketus.pdf
- https://cdn.shopify.com/s/files/1/0431/6885/8280/files/65224966239.pdf
- https://static.usrfiles.com/ugd/3ab5ed_5aa922f0ef6c42b0bb23306f3e15e7d9.pdf
- https://static.usrfiles.com/ugd/5438e3_1834c7438dae46cc8eb6f362a7ec49de.pdf
- https://static.usrfiles.com/ugd/510a18_07bb1a37ace4442890a08dbcf4edce65.pdf
- https://static.usrfiles.com/ugd/ac51ce_f347cb9662294bbbae5c9b29d22d5e62.pdf
- https://static.usrfiles.com/ugd/2c7c49_5c54aac0a665407bb326a80a3dab4364.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000460f.bin` `0ee8bb367251b81d6ece88495c765e3ae115f9aa99144de31886d7512acce58f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x460F	5348 bytes
`font_01_sfnt_off0000582a.bin` `b76296767afc78196d5aad5f2ed4b62c87fc9eeefe5361072adf5b569fd8a44c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x582A	9540 bytes

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