Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb7bf58f65a710…

MALICIOUS

PDF

41.1 KB Created: 2020-07-31 02:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b6deff762b8abea2275231ab0d0054a SHA-1: c8c69a75558abb0110b404ee30b78835e24ba360 SHA-256: 75eb7bf58f65a7103b502549d87ff055c9e7794ed4253430e8402cfe4fc8da26
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Sololearn c pdf', likely a pretext for a free download scam. The presence of many PDF links indicates a link farm strategy, aiming to drive traffic to malicious or SEO-abused sites.

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=sololearn+c+pdf In PDF document text
    • http://files.plpthumanresources.org/uploads/1/3/1/4/131407135/04d0a0.pdfIn PDF document text
    • http://files.dreamsupercars.net/uploads/1/3/1/4/131453536/zesiwesoto.pdfIn PDF document text
    • http://files.delawaresupportandservices.com/uploads/1/3/0/7/130740412/lubobuveto.pdfIn PDF document text
    • http://files.heritageheroesptsa.org/uploads/1/3/0/7/130739144/5496501.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/1/0428/2286/0966/files/gusaxutoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2700/4572/files/42104150877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/2549433449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/nuwironibizumefedaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/dasimubasiwofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/43256714028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/80238419333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/vulosow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3946/4341/files/94217341250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/zuwukosubuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/sojujutelefizugom.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 7

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_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 4732 bytes
SHA-256: e87522be930753ea575b596f681752289b76e0ed8918542ad6b20c7611d6e69a
font_01_sfnt_off0000744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10344 bytes
SHA-256: dc2b7528d25fe5e15b43b0b696d74e8ded1f5b84fb529abd101e862e858db31f

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