Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7806fc5c7292d7…

MALICIOUS

PDF

114.6 KB Created: 2020-08-14 10:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fde3ba4849b1eee2ac21a490bf05f86 SHA-1: 3f927dce5dc3dd51316e6c3de6670df1eda80a83 SHA-256: 7e7806fc5c7292d784d09dd85dd8654ade8c4d412d3e0e777c2e57c7c06ece61
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The embedded URL, 'https://ttraff.com/pify?keyword=guide+for+specifying+architecturally+exposed+structural+steel', is the primary indicator of compromise, likely serving as a lure for further malicious activity.

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=guide+for+specifying+architecturally+exposed+structural+steel
    • http://files.emilyfoxgordon.com/uploads/1/3/1/0/131070207/2587710.pdf
    • http://files.kolayoga.com/uploads/1/3/0/8/130874582/xaboxunovuwo.pdf
    • http://files.xanderchiaramonte.com/uploads/1/3/0/8/130813461/7095272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/29388699111.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/mekuruxikegewawita.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/43917516785.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/absolute_value_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/gagotesafizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/addtype_application_octet_stream._not_working.pdf
    • https://cdn.shopify.com/s/files/1/0433/3256/7195/files/27319797284.pdf
    • https://cdn.shopify.com/s/files/1/0436/5071/1705/files/grade_7_math_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/bisovubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/jiwekukurobapifademirowuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/amplificateur_inverseur_et_non_inverseur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/kasofoxelojuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/14153914499.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/90590083324.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_off0001819f.bin
9f57e621f9c5d83d50e191e5fb3934740136d9f7c16721e8d875d451123ce8be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1819F 5620 bytes
font_01_sfnt_off000194c7.bin
e82615e209d7936edb1021292f6e9579e06385cb2f60d82f24ddeb2b7e079a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194C7 11788 bytes

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