Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c98e39b4387042…

MALICIOUS

PDF

59.8 KB Created: 2020-08-15 18:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe55e3b731fea484fc5d65c5aecad581 SHA-1: 33d34cc04ae7d53b79b888c1633b0c80412fc4c1 SHA-256: 75c98e39b43870423224d50ec09bfe513455e5dc020373e66fcca762f1d0ef93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=lancet+oncology+commission+report'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to potentially malicious content. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.ru/pify?keyword=lancet+oncology+commission+report
    • http://nigasok.thelearningoptions.co/uploads/1/3/0/7/130775795/8585293.pdf
    • http://damerelag.sheppardinternational.net/uploads/1/3/0/8/130874431/72dbaa59.pdf
    • http://files.leadyouhomeoriginals.com/uploads/1/3/1/3/131398574/3da0840a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/10127219733.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/amitriptilina_enxaqueca.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/nexife.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/bescherelle_la_conjugaison_pour_tous_frenchpdf._com.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9989/files/42643345282.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/15308382770.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/jolobixulitorezudirufifok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.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_off00009f45.bin
76578c7f8d053045c004a89d137d350a4a010b034abb0dfff6d004f862e09bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F45 5084 bytes
font_01_sfnt_off0000b077.bin
a9cc788894837f69fd1538c6a5e17ee49ea2aed1db46454cbe7cecf5d6db144d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB077 10636 bytes
font_02_sfnt_off0000d4bf.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BF 4324 bytes