Malicious PDF — malware analysis report

Static analysis result for SHA-256 78db172fed596666…

MALICIOUS

PDF

34.4 KB Created: 2020-08-18 17:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00fd1ba9e946520478835543fdc0bbee SHA-1: a958221c4e70f17f8e782567438079d41ecc2a44 SHA-256: 78db172fed596666e0700c8e40862c39c7158b99deb7e7c68dce477916070c53
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains the URL that triggered the redirector heuristic, reinforcing the attack pattern.

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.com/pify?keyword=casio+fx991es+plus+manual+pdf
    • http://files.capoeira-aca.com/uploads/1/3/1/3/131384071/niled-lesisowesipo-laxijeviva.pdf
    • http://files.mantra-translate.org/uploads/1/3/1/4/131413905/vuzovukorowa.pdf
    • http://files.michaeljohnmccarthy.com/uploads/1/3/1/3/131383386/f8de7f0f7cf7.pdf
    • http://files.welcomeneighborpa.com/uploads/1/3/1/4/131437005/dedurubavokinibujok.pdf
    • http://pexosovux.juliesstory.org/uploads/1/3/2/8/132815002/2373444.pdf
    • http://edu.casio.comCASIO
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/wedetavuwudegevolugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/jaberetozub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/bilurixatulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4192/files/dch_file_ting_nht_sang_ting_vit.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/66620051278.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/xagokirawebomemalajixiwol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/kyodai_mah_jongg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6312/3874/files/ruvaxoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/free_hal_leonard_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/holt_mcdougal_ancient_civilizations_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/wovemedokofin.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_off000048f8.bin
fcb7e963fd5e9bc95f3564a9e976d08e68df0299674ce7e3359d977e764f0a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48F8 5272 bytes
font_01_sfnt_off00005adf.bin
7ee572c057f6682abc9497329d691df54b2a9b3ffd8aaf1b9e610ee8e1208e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADF 9928 bytes

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