Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd4a148739b7687…

MALICIOUS

PDF

58.9 KB Created: 2020-07-31 12:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298dc9881b7f1414e63a8b0c4626d96f SHA-1: e16a3ab0787361eb8d92e681ef167142a597bce6 SHA-256: 1bd4a148739b7687b6c20a60a925d72017b02dde0238733b337f5f0ef78977c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is a known malicious infrastructure. Additionally, it features a link farm hosted on Shopify, likely intended to artificially inflate search engine rankings or distribute malicious content. The ML classifier strongly indicates 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.com/pify?keyword=atahualpa+yupanqui+pdf+guitar
    • http://files.vermontnaturalhomes.com/uploads/1/3/1/4/131454306/339390.pdf
    • http://files.montalvofoodwine.com/uploads/1/3/1/4/131453735/1969771.pdf
    • http://files.blackberrykeep.com/uploads/1/3/1/4/131453493/2187471.pdf
    • http://files.treeoflifeinternationalchurches.org/uploads/1/3/2/8/132814168/101307.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/dexarubazol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1523/3959/files/jaropenevepezusalumapufa.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/30000453375.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/lilibaketukukanolin.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/wasifironejobevuxuvakefem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/25453938187.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/2091060545.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/59284839140.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/pofes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/meleliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/pujiwidofiwubababazuvem.pdf
    • https://commons.wikimedia.org/w/index.php?curid-40454694-
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009be3.bin
40ff6bb4007b2a003ebd946edbd876330b1524b4492bc102aab930ab1e8380ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE3 4996 bytes
font_01_sfnt_off0000acc0.bin
eeb3cefab7710e66ccfb3c22e94d78c096420cf48c35c2b41119baa8448829e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xACC0 16492 bytes