Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64130d03465c382…

MALICIOUS

PDF

42.9 KB Created: 2020-08-15 07:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33a5b44445c96cd2acfdef79b8095ebd SHA-1: f95488d7291236b86156c08117846d8e7d37e4c4 SHA-256: f64130d03465c3821fd48f774c24e7330e2c29fed3136d555fd9c7e0bbe9d3c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to external resources, which is characteristic of SEO poisoning or link farm tactics. One critical heuristic identified a link to a known malicious redirector at https://ttraff.com/wb?keyword=iveco%20marine%20diesel%20engine%20manuals. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'manuals' and the malicious URL, suggesting a lure to distribute malware or conduct phishing.

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/wb?keyword=iveco%20marine%20diesel%20engine%20manuals
    • http://files.chrisneohrunning.com/uploads/1/3/2/6/132681392/fobob.pdf
    • http://rixep.notsuchsecretlife.com/uploads/1/3/2/6/132695675/138c3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/766578053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
    • http://tasatek.stonyhillgardensonlinestore.square.site/uploads/1/3/0/8/130814328/sewibugexipenuvib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/sefedi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/effective_advertising_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/bajaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2034/files/landscape_ecology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/your_brain_at_work_david_rock_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/baberuvusam.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/auditoria_administrativa_franklin_fincowsky.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20136550696.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab4.bin
bea83f0296e9e3e2e3fece256e32f51984e3bdd615adc749178234038571afc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 5256 bytes
font_01_sfnt_off00006c78.bin
9f663ed667be60d721abfcfb547a28ba4f8e7649b102c97d5852f47618c3fa3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 16516 bytes