Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d159d265e93547d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 11:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff655ba6d9367d7a84d5cd0223bd6384 SHA-1: add761d36d02961a7dad779a381f946833ed7d73 SHA-256: 9d159d265e93547d6e6d4714b7a4c6767909012d945e2828e9f23b12263c03a0
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a phishing or SEO poisoning campaign to drive traffic to malicious sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious redirector attack.

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.ru/wb?keyword=measurement%20worksheets%20for%20grade%202%20pdf In PDF document text
    • http://files.enerisi.com/uploads/1/3/1/0/131070688/judirinewus.pdfIn PDF document text
    • http://files.tangns.ie/uploads/1/3/1/8/131871484/pemelinikolevebinuba.pdfIn PDF document text
    • http://files.donaldtrumpacunt.com/uploads/1/3/1/0/131070859/7520e1f8.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/1/0433/3666/3208/files/65929559388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/48903557496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/41129371304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8188/9960/files/arturo_perez_reverte_sidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/application_of_functions_in_real_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/pilosiwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/85342944535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/duxotidibiramopugizevafop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/wedoxeferoxofuwaxaveju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/adobe_signature_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/31317657900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/1120219583.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613F 5716 bytes
SHA-256: dbd9a6264ff01b1e939bd92dc1f84ef315c26860e8af7978da7094b90bdd2fb6
font_01_sfnt_off000074aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AA 10208 bytes
SHA-256: 863f64c283b271243d5a0064c4175c7468321973f58e3eee70aa8a71112ae56e

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