Malicious PDF — malware analysis report

Static analysis result for SHA-256 80747a2935a1ae3b…

MALICIOUS

PDF

56.9 KB Created: 2020-08-12 04:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 719e3bfb473e8a3ec91ad257aa517370 SHA-1: 1833a224b6e560b39e90dd4f417707741c63c2e4 SHA-256: 80747a2935a1ae3b68f8c72f6692c069b980f1433b6ff613a59cf27f31b7fe79
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though partially corrupted, includes the same lure text and URLs, suggesting the file's primary purpose is to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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=tipos+de+anemias+en+pediatria+pdf
    • http://files.mrsudbury.com/uploads/1/3/0/7/130738993/fed582baf6.pdf
    • http://files.nest-of-the-rat-king.com/uploads/1/3/1/4/131454316/6d86c7a657cd168.pdf
    • http://files.higherlevelevents.co.uk/uploads/1/3/0/7/130740420/wawepukadu.pdf
    • http://xefumikid.lec-psaa.com/uploads/1/3/0/9/130969774/zudevawu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/9689214689.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4536/files/fopawatobimoviwomojomase.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/zinon.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/the_seekers_daniel_boorstin.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/pavadadalumujaxoxazojez.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/niwopakakujixiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/juganarixifaxon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/design_and_analysis_of_algorithms_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/air_force_epr_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/73898854343.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/75412853985.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/nejepan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/buda_sua_vida_e_seus_ensinamentos_osho.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/riwutakuda.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_off00009b40.bin
7b72cafe4c0ba4489562e578bb41c1d37ca7ffd2ee98d14d87b18fa66d53661b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B40 5104 bytes
font_01_sfnt_off0000ac7a.bin
d65c6fd7bf551f1efdabc7b6424131f3ae9283bed0187d23dc71442e66c94dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7A 13016 bytes

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