Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3f78a0b77038be…

MALICIOUS

PDF

64.2 KB Created: 2020-08-06 09:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bb106195c1ee5db65490bfb8928332 SHA-1: 7feed09b169057e236518c164656e9f2112793e6 SHA-256: 5d3f78a0b77038be4047f4752c54bba92f46da4dcd485e45ac94892782b906e5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the PDF is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=fundamentals+of+economics+ignou+pdf
    • http://files.artitudemarty.com/uploads/1/3/0/8/130873728/3270096.pdf
    • http://files.sabinalazarz.com/uploads/1/3/1/8/131856330/3790127.pdf
    • http://files.kauaimusiceducation.org/uploads/1/3/1/3/131380308/likawubed_salujejigedor_koseji.pdf
    • http://files.chardoncommunityactionteam.org/uploads/1/3/2/6/132681479/gokosifapox.pdf
    • http://files.mindfulmamayoga.com/uploads/1/3/1/3/131383456/9475299.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/xipuwiruwadifajopig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/adeste_fideles_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/3000/files/jojawefegok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/walker_physics.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/jisamugitifekulalamoko.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/56091473271.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9912/files/67448186420.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4008/files/labanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/tijapefileba.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/xugiraroribetasumeravot.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/temple_of_elemental_evil_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/36507324301.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/rigadogir.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_off0000bf1a.bin
e83448f4d058be10ffa58eb8458133628b9dbf9f8386caed120e969668d63959		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 5332 bytes
font_01_sfnt_off0000d138.bin
2cfe8742550b4c5c22f07e1e76cf81fb902a0232d4f643338c04c098b694eee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 9972 bytes

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