Malicious PDF — malware analysis report

Static analysis result for SHA-256 05027b05488110fb…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 21:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62bd3889b1474cf431712599dac7bb12 SHA-1: 4af8627d26590e084c6ff49f902b47b47a9194cd SHA-256: 05027b05488110fb01c2cad0b1810f244182b146b2d02daba078407b22ab780a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body also contains a URL that points to this redirector, disguised within what appears to be search result text. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=autocad+pdf+underlay+invert+colors
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdf
    • http://files.literaturehouse910.com/uploads/1/3/2/7/132740930/lufomonu.pdf
    • http://bizof.extremechallengepuertorico.com/uploads/1/3/0/8/130814769/gemokowulavazegobopi.pdf
    • http://potem.rsyc-indiana.org/uploads/1/3/0/7/130739723/pasururepi-duwodewovav.pdf
    • http://files.metiworld2020.org/uploads/1/3/1/8/131871859/memiwodubosukeg-nekel-taderebux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/rezugesuveliboruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/zuzulavisujim.pdf
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/zavoxovoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/diagnostic_test_for_tuberculosis.pdf
    • https://cdn.shopify.com/s/files/1/0443/4444/3036/files/ordinal_numbers_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/biology_research_articles.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/nezugulojagidigubimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/subiwesuditavetufanov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/15493113737.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/fotifojujosalemusofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/funevitivitazak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/10478046472.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_off000067c3.bin
319c40299db5f3900495a0a2123fd9fc0ec2ddef02f19591e3053ed97039f950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C3 5180 bytes
font_01_sfnt_off00007977.bin
87346c503232d9bea6e3651b9b89ddf03a71fd665d514e56d47e213853d47738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 10316 bytes
font_02_sfnt_off00009cb4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB4 4324 bytes

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