Malicious PDF — malware analysis report

Static analysis result for SHA-256 0575e00f1208fc87…

MALICIOUS

PDF

47.1 KB Created: 2020-08-03 14:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38fded29c7c736fa9599eade7a368871 SHA-1: e57270421a885d87353072683c33c131f05ce3c6 SHA-256: 0575e00f1208fc878feb74fdcf4e470266bb6a7d935a5ea9ff6a75e576bd2ceb
202 Risk Score

Malware Insights

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

The PDF contains numerous links, including a malicious redirector at 'https://ttraff.cc/pify?keyword=pdf+to+dwg+file+converter+free+download', designed to lure users into downloading potentially malicious files. The document body text and heuristic firings indicate a link farm strategy, likely to distribute malware or conduct phishing by promising a useful tool. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.cc/pify?keyword=pdf+to+dwg+file+converter+free+download
    • http://files.resistlaboratory.com/uploads/1/3/1/0/131071137/savemefejo.pdf
    • http://files.singularinsight.com/uploads/1/3/2/6/132695990/26baa9b184ff90d.pdf
    • http://files.clevelandtncrawlspaceencapsulations.com/uploads/1/3/1/3/131383384/suwakateb-minuxekoxakibex-kuxotojumuvom.pdf
    • http://files.shelbybaldock.com/uploads/1/3/1/6/131606360/zizorawika.pdf
    • http://files.uniquegraphicdesignz.com/uploads/1/3/1/1/131164236/1083482.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/57038278229.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/31046757182.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/81482987695.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/77944227558.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/68373149111.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/vukonenowununekakadi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/448379901.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/minecraft_xbox_360_mods_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/fozupazeripogupobagutodu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c5c.bin
5460257342adcd3ea134c45552170c51d1fb98466762521b51b4adc8e54d1582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 4952 bytes
font_01_sfnt_off00007d4f.bin
92516cf70e5c4f34c1fa157b0126e83891f3ec5269efae996ed5e6924e984037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4F 10420 bytes
font_02_sfnt_off0000a0f8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F8 4324 bytes

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