Malicious PDF — malware analysis report

Static analysis result for SHA-256 61edfe5777d76700…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 07:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a7513ebd6f6e3c5c579170599e4948 SHA-1: e478c720f4344a78be5b5110b691b001a3f278ff SHA-256: 61edfe5777d767001805d8ba6a5b9228ff2d791cb256ddad16ace72517878076
154 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 an online converter. This suggests a phishing or malware distribution attempt. The document body also contains numerous links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious content. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate malicious intent.

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=online+converter+pdf+image+to+excel
    • http://sixuzuju.designcycle.co/uploads/1/3/2/3/132303382/ba2c8.pdf
    • http://files.kissabulls.com/uploads/1/3/2/6/132682994/72a5e17983cc5.pdf
    • http://nemer.movementandsounddance.com/uploads/1/3/1/1/131164239/kewanazem.pdf
    • http://files.lawofpositivism.com/uploads/1/3/1/6/131636845/bemaginejuremami.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/49224855015.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/pneumopathie_d_inhalation_traitement.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/22594641744.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/vetijutawumokefibaruwud.pdf
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/2005_vw_jetta_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/vizisifowitaje.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/51527045780.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/john_hopkins_antibiotic_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/47200741244.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/portugues_brasileiro_para_estrangeiros.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/tugesu.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_off00005ece.bin
92ac8079cdf6fbf357e6afca38fc8a877cf1719ad98fd059125df71c88e514a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECE 5452 bytes
font_01_sfnt_off0000714f.bin
c9efb3e4e75a477290315c09d8121705d9ea5399f23aa4fcdb31516df3a93b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714F 10128 bytes

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