Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc6c3d42bd7f783…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 01:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3666935cc8aae848f0f3b3a37dfb45d9 SHA-1: 2c7ba08b42d2e68f572620da087dd62744024ce0 SHA-256: 7cc6c3d42bd7f783ebf2a0aaad737ae991ba66be0aa8938266049949a64fea0c
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised with a seemingly innocuous keyword. The document also hosts a large number of external PDF links, many of which point to benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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=cute+smiling+baby+girl+images
    • http://files.patricklyons.com/uploads/1/3/0/7/130776208/gapabojanafire_tisezaju_nemude_zobumesawofo.pdf
    • http://files.championlifecenter.org/uploads/1/3/1/4/131411281/vibor.pdf
    • http://files.4toebooth.com/uploads/1/3/2/6/132680994/71b43efb44adf1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/dmv_sample_test_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0327/files/44986460587.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/acuerdos_de_basilea_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/86354877911.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/6282174234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/87600555055.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/rutopegutuvujepezezuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/gifubixowezikuwunaxav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/mogasazoriloziwekofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/fodokanolopikuloj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/the_five_canons_of_rhetoric.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/fatulopunuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/13279908918.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_off00006df9.bin
fcbde3eb4d10db099ae3dd0c0c0809abae474ce21f978935755ca43a205db064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 5152 bytes
font_01_sfnt_off00007f6e.bin
25b16ca7199eb5dd76f7ed7d25b1837d2dff11b3b405dc3c7e3462e520d731e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 10280 bytes

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