Malicious PDF — malware analysis report

Static analysis result for SHA-256 524b5adabc3afaae…

MALICIOUS

PDF

106.3 KB Created: 2020-09-11 21:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f8441f034396889bf199a6aee9385f2 SHA-1: 20cdfc47dce7ce84ef88b43288b1809fa35f4f97 SHA-256: 524b5adabc3afaaebdc738cd09545d57c3dcfeb1ebdcd3a7cabacd4a344141cf
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious link, suggesting it's the primary lure. The presence of many links to external PDFs, some hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content.

Heuristics 3

  • 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.
  • 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/wb?keyword=agonistas%20beta%202%20adrenergicos%20pdf
    • http://zafudukux.heleneathanasiadis.com/uploads/1/3/2/7/132712461/0bc19027.pdf
    • http://subivofij.prcawa.com/uploads/1/3/2/7/132741508/4300006.pdf
    • http://files.kouturenailbar.com/uploads/1/3/2/6/132682615/8c8e6.pdf
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/99460332365.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/consecuencias_del_cancer_de_piel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/96935348025.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/bidoni.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed71f763ab1042cc98a3aa668a8935ae.pdf
    • https://static.usrfiles.com/ugd/455f95_e7536f96d7af47d594c8248f99b283b0.pdf
    • https://static.usrfiles.com/ugd/724fb5_4dde7580c13341ffa14124a7b9775ff5.pdf
    • https://static.usrfiles.com/ugd/764aaa_e4bae1f7b4a54173b93e34dc30dc30b9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/front_squat_smith_machine_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/66444290577.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/76506354123.pdf
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/solagi.pdf
    • https://cdn.shopify.com/s/files/1/0462/3230/5813/files/anydesk_for_ubuntu_18._04.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f91.bin
c19c65b3aef3cd538ac028ad446e46dc44c61531cf9b98357ea3edc3146e4855
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F91 5340 bytes
font_01_sfnt_off000161c6.bin
8e571fc9ff894956087e78917212b53c0d67f29ec22a378cf3b030f5737d7dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x161C6 13448 bytes
font_02_sfnt_off00018bf0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF0 4324 bytes