Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1e709db5933326…

MALICIOUS

PDF

37.5 KB Created: 2020-08-03 00:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 799fc0894319ac199599a3a324e11da8 SHA-1: d1d1b8c4ba38a0a22ab2ed387e43198da6c5923a SHA-256: 0d1e709db59333265a0d634e1544520c86677ef27dc22d81c842c5fa97968657
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, https://ttraff.com/pify?keyword=3%252F+2+as+a+decimal, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking through a series of links, potentially leading to malicious content or further compromise.

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=3%252F+2+as+a+decimal
    • http://files.kellymartinbooks.com/uploads/1/3/1/3/131383998/bb7251d9023fb1c.pdf
    • http://files.handfelted.com/uploads/1/3/2/6/132695730/8d541423496cba.pdf
    • http://files.cm-miller.com/uploads/1/3/0/7/130776054/270f74867298e.pdf
    • http://files.amybournephotography.com/uploads/1/3/1/4/131407148/37f93859efa295.pdf
    • http://files.gotothezonewellness.com/uploads/1/3/2/8/132816202/vizorojasoko-wokukupulin-tutozuziruxovu-ladil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/wimesikerenutekafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/toduwodokudunipokoben.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/46827022344.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/20887426872.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/vunadafenezirodixomurikat.pdf
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/35492343848.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/pathfinder_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/gupifarumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/xebedurifepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/88129799729.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_off00005485.bin
a29f5b18a03cb28de4d616e82650aa92a01b678a843680239a778322846f648c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5485 5228 bytes
font_01_sfnt_off0000663c.bin
aea6c31cded7b130f9d811c4111454d862a49edbccb55ba4d9e468b793224293
pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 10344 bytes