Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4aab13d70af35ed…

MALICIOUS

PDF

33.0 KB Created: 2020-08-04 03:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5837c50cf2c400ce24bcd2509f7ae22 SHA-1: 15e70694431d5f542be597f4d93a8d78e046ea12 SHA-256: f4aab13d70af35edc0cbdefc2849e1b1bf481479f3c5d39e0557e79c863e4c77
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.com/pify?keyword=adding+fractions+tarsia+pdf'. This suggests a link farm or SEO poisoning tactic to disguise malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=adding+fractions+tarsia+pdf In PDF document text
    • http://bezuxu.yorkunidarts.com/uploads/1/3/1/0/131070590/famirewi.pdfIn PDF document text
    • http://files.theitinerantoaf.com/uploads/1/3/1/8/131871717/laximuv-dopibupoxo-jigoborutixolon-xugerijeluzis.pdfIn PDF document text
    • http://files.write-the-vision.com/uploads/1/3/1/3/131380847/tatexapija-pisisu.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/1/0430/8123/6634/files/99281324594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/89247282502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/11301206199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/begemibugobar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/masodinafiminuniwololode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/51399859310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/watopokedexupanulorag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/4chan_serial_killer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/purebdcraft_texture_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/tigamadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/71055586902.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
🗂 Part of campaign: tormonbrothers.com 3 samples

Related samples 3

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_off00004643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4643 5280 bytes
SHA-256: d46d15b50aca4c5ff3a96825ecc0786ceb3e4ba831c1d03ad6f9418458e6023f
font_01_sfnt_off00005852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5852 9060 bytes
SHA-256: b3aca68b3cba27d37260857e81aa04246ea0a7981fb036abffdd82a2de7deac3

Open this report in the interactive analyzer, or submit your own file for analysis.