Malicious PDF — malware analysis report

Static analysis result for SHA-256 71060eaa60a0207f…

MALICIOUS

PDF

79.0 KB Created: 2020-07-30 05:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c9c36eafdaec300b30b44051323b36c SHA-1: ed6db81c685411c1ea4b6a77510c5a3e8d612b23 SHA-256: 71060eaa60a0207f69676f9eb147590ed2b7d8aa83fbe441801123fce507aa5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=giorgio+agamben+books+pdf
    • http://files.kidsonlineworld.com/uploads/1/3/2/6/132681832/3855622.pdf
    • http://files.missionpilgrims.com/uploads/1/3/1/3/131379456/wudizugupukilat.pdf
    • http://files.azmilehighphotos.com/uploads/1/3/1/1/131163959/latizerizeju_nozut_makujitifoduwos_fopezulaxo.pdf
    • http://files.atec-rental.com/uploads/1/3/2/3/132302888/4fc4a8c3a3b0e8.pdf
    • http://files.vagabondphilosopher.com/uploads/1/3/2/6/132681502/4823649.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/89630215266.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/waxesoviwekixuves.pdf
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/99358123319.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/petopakoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/damomugetom.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/69841064906.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/40874196299.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/49663757464.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/73684924237.pdf
    • https://cdn.shopify.com/s/files/1/0437/9302/3133/files/16855946748.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/buboresarijubelakezupaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/13525972508.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/82891078863.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_off0000f0ac.bin
03529e34da5e2883b1b87bab38ae3802e81b0287e00a6368f40a56e83200948e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5272 bytes
font_01_sfnt_off00010275.bin
938fc2e24325544fb372f078d8016467b66f350206fdad3ecb098a8d69f103cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10275 13348 bytes

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