Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c42b4857979489a…

MALICIOUS

PDF

70.7 KB Created: 2020-09-01 07:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14426e3d38b1df7a1db0ee7e52b6e69d SHA-1: 78a196cbf71c244478e77ada5f19a49fe507ba16 SHA-256: 4c42b4857979489a77f858239a4a8b57dab2f11b99febfd87c611a47a4a03987
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, forming a link farm. One of these links, 'https://ttraff.ru/wix?keyword=augustus+apixaban+trial+pdf', is identified as a known malicious redirector. This suggests the document is part of a campaign to lure users to malicious sites, likely for phishing or distributing further malware. No scripts were extracted, and the document body is heavily obfuscated.

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.
  • 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
  • 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.ru/wix?keyword=augustus+apixaban+trial+pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/35721049286.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0462/5622/6458/files/19151590741.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/92046075024.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/5473310966.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/a_view_from_the_bridge_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/tutisufixisibekovis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5071/files/best_android_emulator_for_pc_for_pubg.pdf
    • https://cdn.shopify.com/s/files/1/0438/2775/7216/files/43554870293.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/fuwivotufewexurekuzopi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5233/3206/files/template_for_drunkard_path_quilt.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/wadeful.pdf
    • https://static.usrfiles.com/ugd/f65175_8dce455a26fa45e981ff9b5fb1ff444a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7dd0616201f9431fa549e7e12d60c31f.pdf
    • https://static.usrfiles.com/ugd/97493d_1707d4fd6634408a8237d4426c1c905b.pdf
    • https://static.usrfiles.com/ugd/9e41f0_8c55e22bf21c43c3bc7bdcdc7899ff05.pdf
    • https://static.usrfiles.com/ugd/79e0dc_5a524d27b1844ef8bde31146e2c7b840.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d817.bin
3164c2f43f30dcea1b717411eb6bd1bac4fbcdb6a82b4a6741032b4e6c4f542b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD817 5408 bytes
font_01_sfnt_off0000ea89.bin
d772743f07f8ba99fde359a469532e5de5f947ed4a6d09dbf456f45da280292c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 10312 bytes