Malicious PDF — malware analysis report

Static analysis result for SHA-256 99568d9d3dce76ce…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 06:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02bcaaf2ba5833c1e141de9395a7ac3 SHA-1: bbab08d536d2c53c710c5738c2c025510b921066 SHA-256: 99568d9d3dce76ced5aaf6733520b201cb3b134add6745a76d68e8eebf2fb48e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=professional+bio+sample+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. No scripts were extracted from this sample.

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=professional+bio+sample+pdf
    • http://files.wrprc.org/uploads/1/3/2/6/132695467/xovazepetoku.pdf
    • http://files.theinspiracy.com/uploads/1/3/1/6/131606965/8515383.pdf
    • http://files.racewood.com/uploads/1/3/2/6/132695492/zamadofifefar-jekepuso-xaxibad-zidisiziji.pdf
    • http://files.racewood.c
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/85467846541.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/the_quantum_astrologer_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/posasupezegirolape.pdf
    • https://cdn.shopify.com/s/files/1/0436/9576/7706/files/convert_cdr_file_into_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/practical_environmental_bioremediation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/bamelegajolazedemuweruno.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/mobifejugagefelof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/tisekomutowota.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/40554125586.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/29965451150.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/mozagemuzitidam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/dizuzukudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/pilelirutemexem.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000736f.bin
374dca67b437ccc1d1bcc0056c12791d443a23ed5cff94cb4726440cdabc1097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 5328 bytes
font_01_sfnt_off00008564.bin
dd1401d0babfe4dc394f67b0d45d2c44a84b6f2eaf60bcbe38e195a4438ce4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 10664 bytes

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