Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b7951ac0271966…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 12:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4393225ac2b54f3d9fdcaadb1016c85f SHA-1: d9396fa25233110fb6e66650a6b1309c1b22795f SHA-256: f0b7951ac0271966e03444e9109715e957b021e8b2e02d16d8add26563d1f793
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the text 'Debate about school uniforms should be abolished' and the malicious URL, suggesting a social engineering pretext. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely to improve search engine ranking and distribute malicious traffic.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=debate+about+school+uniforms+should+be+abolished
    • http://pituwuz.school.stmaryspontiac.org/uploads/1/3/0/8/130873952/nupokexu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/44787536445.pdf
    • https://cdn.shopify.com/s/files/1/0448/1482/7677/files/76674637820.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/ventral_hernia_patient_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/95507914662.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/69541122647.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/brick_breaker_world_champion_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0437/5203/0357/files/biwijipivanamaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/circleci_android_build._gradle.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/toefl_reading_passages_practice.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/wordly_wise_book_7_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/wapuzezukidabanutoliz.pdf
    • https://cdn.shopify.com/s/files/1/0450/8942/3523/files/35295720041.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.

FilenameKindSourceSize
font_00_sfnt_off00006763.bin
9984013367078bf14b13b79b538dffb13aa572ba634bcb0462a6832ec9ce595a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 5400 bytes
font_01_sfnt_off00007988.bin
829b9d00cbded790940967c153429eec70949cd7393626081d74a918a2cec82a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7988 10244 bytes

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