Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a36f1b40565c8b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-03 19:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c6fdea7e05d3e42eaf80c0809422048 SHA-1: 90981f7376e75234b86d8da9ad95c3a3ec9e9d0e SHA-256: 60a36f1b40565c8ba7bb19cab31d962379e4fc3880b547c70933b28645f0f440
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting an attempt to lure users to external, 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=equidade+no+sus+pdf
    • http://files.drallisonreidchiropractor.com/uploads/1/3/1/3/131379552/seguj_nemopizapidula_jonewoxidexol_ziwuzesiti.pdf
    • http://files.ward72joburg.net/uploads/1/3/1/4/131406348/nomosawizubot-xogukilipur.pdf
    • http://files.aliusresearch.org/uploads/1/3/1/4/131438216/dekolijetuvonigup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/39028299059.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/vasefemoritufasixutifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/84467178343.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/gakatokej.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/wagew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/70719343567.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/tawetoxofaxokij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/munolefasejen.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/59517088879.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/zefatebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/samupasuxomomazugi.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_off00005dc3.bin
24f6eecebb90912b884cab4367924983268059d1bc8d201b387aa686090b228a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC3 4792 bytes
font_01_sfnt_off00006e1a.bin
fddb07729b51f249850ba02f5166b50bf3a619124983c7fe86880bcb55b9b959
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1A 10204 bytes
font_02_sfnt_off000090dd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x90DD 4324 bytes