Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae62b89d86c73b90…

MALICIOUS

PDF

49.3 KB Created: 2020-08-12 20:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edd2cf7d767844b7f85ac9b4d143d320 SHA-1: 3db16732b1f2abb04b362ff09128ed7de0016325 SHA-256: ae62b89d86c73b9014eabe0afc94d3ec77f1de24777864e9170942ad265b9d92
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=gastroenteritis+kronis+pdf', points to a known malicious redirector. The file also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, including 'https://cdn.shopify.com/s/files/1/0431/2553/8970/files/robematumixesopo.pdf'. The overall structure suggests an attempt to lure users through SEO manipulation or phishing by redirecting them to potentially harmful content.

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=gastroenteritis+kronis+pdf
    • http://files.lavingtonurc.org/uploads/1/3/0/7/130776661/03c6c889.pdf
    • http://files.gozamurai.com/uploads/1/3/1/8/131860060/9c8ebd73cec.pdf
    • http://vuwid.nprycetest.com/uploads/1/3/1/4/131483138/kuzoke_fisitajopatewa_tobavimeze.pdf
    • http://sigiz.jacquelineshimeldcelebrant.com/uploads/1/3/1/4/131453133/kelap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8970/files/robematumixesopo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/30_day_ab_workout.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/historia_del_neoliberalismo_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/xukase.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/mumuderazunexinuxonuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/diprosone_loo_bula.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/cantate_domino_ssa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/modibokekidupav.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/werib.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/cancer_de_estomago_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/selavajumimoxogobanus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074cb.bin
95cfb5c243c81022710c17a385519969ad4fe2a7e8104777f4fcf5cff3819791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 4884 bytes
font_01_sfnt_off00008577.bin
a79b41f63f038d9d0f262319ddef80436046628652b0cd8170b2623f30ada808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8577 10996 bytes
font_02_sfnt_off0000a9fc.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FC 4324 bytes

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