Malicious PDF — malware analysis report

Static analysis result for SHA-256 0892532298f05150…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 20:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e983a793e2769749965a0f4376ec567b SHA-1: 03aff4b6c2e97de6f352110c054e7f2b1cf36055 SHA-256: 0892532298f0515013b710b3fc82cc4d47c3d41637d6a91fd3f1e1b6c2ccdfec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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=arduino+uno+r3+pinout+diagram+pdf
    • http://files.partscare.aero/uploads/1/3/0/8/130813526/tezuwadoxajivezab.pdf
    • http://wopulew.turkeycreekretrievers.com/uploads/1/3/1/3/131398140/3586846.pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • http://narimu.jessiesfitclub.com/uploads/1/3/1/6/131637016/bafuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/81448802028.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/17884890826.pdf
    • https://cdn.shopify.com/s/files/1/0434/8323/4470/files/xalivedaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/american_english_file_2_second_edition_workbook_resuelto.pdf
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/storage_media_for_avulsed_teeth.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/wedisoxufolevuzumez.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/70402806007.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/tikafixaxaluranenuvuzel.pdf
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/91106076130.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/the_brightest_stars._poar_zmysw_anna_todd.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/pebebeva.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_off00007530.bin
da666641453cf1e4c4c1131c0b8d1e8f13b5bc1aa7ffd87a2dcb1c42c84cd457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7530 5304 bytes
font_01_sfnt_off00008726.bin
c317908d94223702e3c44e467a699aa2828cd2fdaf6f8890c00960709692b56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8726 9900 bytes

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