Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a07ece10ad04ed…

MALICIOUS

PDF

64.4 KB Created: 2020-08-15 01:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c011d7093c6c6ce80b42691e76b16a85 SHA-1: abbe65303ce4d61a4b51e8690a48004d66742083 SHA-256: 76a07ece10ad04ed5620f2c27716cc92e3da5e37e404a836f200c7b1bd8196b1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a PDF redirector link pointing to malicious infrastructure. Another heuristic flags it as a PDF link farm, indicating a large number of external links. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=bootstrap+4+form+custom+validation+example', is a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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=bootstrap+4+form+custom+validation+example
    • http://zarefasa.psurochester.com/uploads/1/3/1/4/131407995/5d00e43cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/9243/0248/files/rodurijekubafedajuju.pdf
    • https://cdn.shopify.com/s/files/1/0444/2229/9815/files/kubota_front_end_loader.pdf
    • https://cdn.shopify.com/s/files/1/0436/5457/8334/files/mukukiwawowuliduvukikimok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/misplaced_modifiers_examples.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/17808225761.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/faxagefikobowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/tomidikonorulaxupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/82835242592.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/kuvabobegifekisoju.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_off0000ac78.bin
7476203f45c4885d31095cd0b3cf4a46b3bd07e174421470cfb0788c158e8f06
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC78 5568 bytes
font_01_sfnt_off0000bf5d.bin
ae1b04475ebbf78c9a85be59dc4f3708115caa27e3c14823d9e5658a7e1f0c04
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 17248 bytes