Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f2d09fa256cf42…

MALICIOUS

PDF

50.9 KB Created: 2020-08-14 01:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 846a377f74f6863ceecf5ee0b8104a9b SHA-1: 733ecde7a306238ed2185759ffcb531b9d67aeb4 SHA-256: 75f2d09fa256cf424212d19f99fa2164dfb7f94af5c51b5735c0ec1286bac093
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. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests a link farm or SEO poisoning attempt.

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=angular+formcontrol+disabled+valid
    • http://xusaw.jeanwhitfieldjewellery.com/uploads/1/3/1/4/131407552/sevuvinetekafe.pdf
    • http://files.managingupset.com/uploads/1/3/1/6/131636676/gatifuwakigavatirat.pdf
    • http://files.btwmovie.com/uploads/1/3/1/4/131453253/38962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/bafapidip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/circus_cartoon_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/4710288992.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/fofupilamigalaberewelenu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/kabbalah_libro.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/11498714815.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/sixusebiwebugaledesebivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9957/files/linear_algebra_friedberg_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/adobe_acrobat_editor_trial.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/defoduxevivufuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/xiviz.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_off00007e18.bin
fd2d3a98c928efd79633cbb76e60dd68d220a256bda334701a0f276b08324aae
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 5528 bytes
font_01_sfnt_off000090d3.bin
f98146625ac0965593f20aff69582e9e6c036ffe8107c76ae056c1614fef9067
pdf-font-stream PDF embedded font (sfnt) at offset 0x90D3 14372 bytes