Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f89cef1986a2c58…

MALICIOUS

PDF

103.6 KB Created: 2020-08-03 23:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52781302fe28afbf4b950dd6aa29b2f9 SHA-1: 935e708bbf8ec3ce0276fdc93814baae926b6a7f SHA-256: 0f89cef1986a2c582087ac52bfd3d0dcad1edfd18dc1e4ed92cb0309c44126a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a PDF about aging. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to redirect the user to potentially harmful content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious redirection attempt.

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/pify?keyword=cambios+psicologicos+en+el+envejecimiento+pdf
    • http://files.climbingpamphlet.com/uploads/1/3/1/6/131637047/f749a.pdf
    • http://letujeli.4rtomorrow.org/uploads/1/3/2/7/132741029/aaef1d1759fc.pdf
    • http://files.staartyou.com/uploads/1/3/0/8/130814492/6736a5b6dd06c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/81525122020.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/wolizuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/60375835966.pdf
    • https://cdn.shopify.com/s/files/1/0432/5674/2046/files/jadisafeku.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/wenupure.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/kitibejivozakokojomodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/12428792834.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/50451388103.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/94476894907.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/mind_on_statistics_5th_edition_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/fifepisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/ramilod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/wajasoneginegofefor.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_off000147ce.bin
f8995fb678b76d68d7eda3b407cc725cf227a0fc4351b285c60e32715bfa5a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147CE 5468 bytes
font_01_sfnt_off00015a66.bin
e0bb428f531c934580912b685f6cd5ec7d940e2c2dcb23f2d17dc49ab0d94ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A66 11812 bytes
font_02_sfnt_off0001805d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1805D 4324 bytes

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