Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedc0a1d21c3d71d…

MALICIOUS

PDF

48.5 KB Created: 2020-07-25 21:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e763ac31080a1fd48771d06b39083d0d SHA-1: 1524f3bbc3fced17094888de46ced155fbe5faf4 SHA-256: cedc0a1d21c3d71d902c28eb74538ef34a22598708f7afc30d5a6f888c936582
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with the first being 'cdn.shopify.com/s/files/1/0431/9900/4831/files/dofiladevulemer.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Office 365 proplus administrative templates', suggesting a potential lure.

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=office+365+proplus+administrative+templates
    • http://files.headstrongequestrian.com/uploads/1/3/0/7/130740297/7833472.pdf
    • http://files.savethewindmillpub.com/uploads/1/3/1/1/131163533/dewamowelik.pdf
    • http://files.bellacarpentry.com/uploads/1/3/1/3/131380723/7442248.pdf
    • http://files.heathergolding.com/uploads/1/3/1/4/131453045/pumabu-joperaf-kupunijivoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/dofiladevulemer.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/wekalixizijapajenefadofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/kagovuzopimofamalomax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/jazepimivupipot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/zizekeji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/32701106788.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/wijanoxuzak.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/60989552405.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/52154526428.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/6371209998.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007386.bin
5f0aed3895358ee33e56dfac5204b5b1dd096f4c7073628401ae8833ab2f26c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7386 5712 bytes
font_01_sfnt_off000086da.bin
5a80cbd4e68e9e7d27d9fe9f62ffc363d2e7e7f296ac7dd105747bf2a9e6677e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DA 14740 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.