Malicious PDF — malware analysis report

Static analysis result for SHA-256 7036eebb2da0bea4…

MALICIOUS

PDF

178.9 KB Created: 2020-08-08 06:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5879272aedfc2732b1a73f363eebb9 SHA-1: 52dcea137a8170a4da167d32b94a9cc0ca97eaf4 SHA-256: 7036eebb2da0bea47d77ff8d9926767c0f0698d691f55289af107ebce91980aa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as lecture notes. This heuristic, combined with the ML classifier's high confidence, indicates a phishing or scam attempt. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/pify?keyword=population+genetics+lecture+notes+pdf
    • http://files.hilesassociates.com/uploads/1/3/0/7/130738722/keletupukeripu.pdf
    • http://files.blaessis.com/uploads/1/3/1/8/131856649/053b25b2.pdf
    • http://files.revwalter.com/uploads/1/3/2/8/132814305/likeginidomo.pdf
    • http://files.ausmazehanatkhan.com/uploads/1/3/0/7/130775853/wuzef-jejubez-nunikawitami.pdf
    • http://files.cantikjewelry.com/uploads/1/3/0/7/130740510/6583965d3c48294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/75700153290.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/throw_some_mo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/tulag.pdf
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/ponosanebagozomul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6312/files/41745101542.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/pofodigojulomujikanajes.pdf
    • https://cdn.shopify.com/s/files/1/0441/2293/1352/files/dutukorurepekafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/86664969591.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/kekisakudomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4716/files/air_pollution_causes_effects_and_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0428/5503/9135/files/63113317904.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/compact_key_for_schools_teacher_s_book.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026a52.bin
96fc85d80b5e55ffbcdb02305ec478fc2d034b9ccac43aa0d0b2ab5fc138c2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26A52 5208 bytes
font_01_sfnt_off00027c0f.bin
9e35ff88d8b136d7dd6092ace1089c1ace593b8cfdddba4663a71be61ffed0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27C0F 16492 bytes
font_02_sfnt_off0002af64.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF64 4324 bytes

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