Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff99efa6fe132c5…

MALICIOUS

PDF

51.5 KB Created: 2020-07-30 08:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aafbe558b3fd4779951d3ebceeba903e SHA-1: 04d287b507e406e9c985891495e4a2480f59b937 SHA-256: 6ff99efa6fe132c55781f5baf858f1b561a6445ea53f19cf8c90a0f76fd702b0
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically `ttraff.com`, which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to "cement plant operation pdf". The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm strategy. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=cement+plant+operation+pdf In PDF document text
    • http://files.quasar-resources.com/uploads/1/3/1/8/131871583/5853876.pdfIn PDF document text
    • http://files.ilketshallstandrew.com/uploads/1/3/0/7/130739986/8587968.pdfIn PDF document text
    • http://files.ncexchangeclub.com/uploads/1/3/1/1/131163914/e3f904eb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/29902053335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/76772017878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/88619457683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/4861267605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/vakuxumorup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/13307658637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/wabaxuditenokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/lanifepowidetisapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/81433569110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/sobosarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/2864635586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/sezasino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/71319644818.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 4820 bytes
SHA-256: 3674f7e14af330dde3b97da200cb868f79f26b4361e5262e41ba61f6620ed5ee
font_01_sfnt_off000086d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D0 10208 bytes
SHA-256: 4db4d53e18a779d9ea7c53b7ee1249b7368b1dd18df3b4321902c3a65c9548ec
font_02_sfnt_off0000a9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E0 16448 bytes
SHA-256: 4972c892cf783310df7ebe7a43044f7b4e4d650808add06809858f2f0e6eeb09