Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fd777ef66343ce…

MALICIOUS

PDF

45.6 KB Created: 2020-08-13 00:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d77092e0e029c79fc2de8370179b25f SHA-1: 49dae1426885156476710201d70e0556d90add74 SHA-256: 10fd777ef66343ced5ef320aab04bb4199e645416047e8b24969d033e0feb044
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link indicate a malicious intent to lead users to harmful content.

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=ostrich+farming+in+nigeria+pdf
    • http://files.andyjohnsonpsychlab.com/uploads/1/3/0/7/130740213/kovoxug-kezuzunesa.pdf
    • http://files.zionlutheranclark.com/uploads/1/3/1/4/131482886/kewuverogupegozuluj.pdf
    • http://sirisojux.madisoncountycc.com/uploads/1/3/1/4/131437792/notowa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/denivisujogoveriwekene.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8247/files/takajasebulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/bachianas_brasileiras_no_5_guitar_voice.pdf
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/9760858004.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/64765484660.pdf
    • https://cdn.shopify.com/s/files/1/0451/7367/0037/files/a_league_fixtures_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/78326242337.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/71591942586.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/rumazexavexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3391/8616/files/favezokuwigovezamizewasak.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_off0000676c.bin
cfddae3e51e265fe3014e24d77c347a61cc6908f236dead14bb89dd2886b1c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 5240 bytes
font_01_sfnt_off00007910.bin
716fe89c04e274596b70edf15b75e6fc6b0b4662525b9e6d3efecb52a759a5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7910 10084 bytes
font_02_sfnt_off00009b6f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6F 4324 bytes

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