Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b48b9531c738025…

MALICIOUS

PDF

40.4 KB Created: 2020-10-03 15:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d247e5ffbaeb9737f172f71d9d31256f SHA-1: 101c026764fe80a75cb91e543d30115e9e166697 SHA-256: 1b48b9531c738025a6ce5377e7d5700c4758b59f3d781dbb077e230a542d3d53
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.club'. The document body, though partially garbled, contains text related to a treasure map and urgency, aligning with social engineering tactics. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/pify?keyword=follow+treasure+map+signpost+junk+junction+forbes In PDF document text
    • http://kosib.winnebagocountyrta.org/uploads/1/3/1/6/131606165/c7ff0fd04acb.pdfIn PDF document text
    • http://files.accommodationharrogate.net/uploads/1/3/1/1/131163736/5062929.pdfIn PDF document text
    • http://files.lcnfarm.com/uploads/1/3/1/3/131398254/kuwumufubil.pdfIn PDF document text
    • http://jinijuxi.ps31artsmart.com/uploads/1/3/1/3/131382028/salevogopumafum-bukikalawo-supojisokelig-rulodasa.pdfIn PDF document text
    • http://files.sligogreenway.com/uploads/1/3/1/4/131407135/retegopifenat.pdfIn PDF document text
    • http://files.lizhumestudio.com/uploads/1/3/1/8/131856119/gumubol_tajuvunig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9425/2961/files/97943059524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1548/7135/files/47490783918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/ozark_trail_yurt_tent_directions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9027/8568/files/ripejad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6559/2987/files/95609022451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5265/2961/files/does_my_head_look_big_in_this_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/57649341426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/80244715586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/78266835093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/steam_validation_rejected_gmod.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E28 5660 bytes
SHA-256: 08773aa00974a7c6a6fb0014f4062a742fc9028a9ac69b1eb00dbacfa425d809
font_01_sfnt_off00007175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 10128 bytes
SHA-256: 92fa3315cde470b26353e0a14ab7fb163cd2f0d55292f9653c94abd96ee69438

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