Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2d01192eb39f48…

MALICIOUS

PDF

45.9 KB Created: 2020-07-24 18:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e122352e920a2ff85ff9153b29ccd77e SHA-1: c4653344861df6de0556636d2a0ea8fd4b346297 SHA-256: 6f2d01192eb39f48e221a4b88bb816193597e80b59a3c8007525a3fa9f1f0dbc
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also listed as an embedded URL. The document body, though heavily obfuscated, suggests a lure related to 'basic computer knowledge for interview pdf'. Another critical heuristic indicates a PDF link farm, with numerous external PDF links, many hosted on Shopify. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's purpose is to defraud users through fake prizes or delivery requirements.

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.
  • 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=basic+computer+knowledge+for+interview+pdf
    • http://files.sgdrumacademy.com/uploads/1/3/1/4/131437711/xiguje_lobisekum_zuwosetazi_puguvodap.pdf
    • http://files.scifi.cards/uploads/1/3/2/6/132681674/kanopawemuredinov.pdf
    • http://files.coxptsa.com/uploads/1/3/0/7/130739308/dirivusova.pdf
    • http://files.seoidproductions.com/uploads/1/3/1/4/131438570/xajep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/59452966480.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/semerugofawov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/bomurajatipadawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/4772726657.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/lotewegabezoxigusemani.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/rukumiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4582/files/82390807391.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/89615499393.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/tupatani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/77606182074.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007303.bin
e9743acd31ed7d937937f7ea35a0a494fec742049b5b2030172dc95ed7093177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 5624 bytes
font_01_sfnt_off00008625.bin
6058d1084ce360d09dd04f8a80a61c3890af240c5f28e3b69902030f9cb93352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 10272 bytes

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