Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ba65f47f8c3023…

MALICIOUS

PDF

33.4 KB Created: 2020-08-22 06:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99bda8cc042fe80277ae9d6b4ef3d48a SHA-1: f8fc78a2f717ce7813eaf60aa0c23b10f10ab2bd SHA-256: 73ba65f47f8c3023cb1a13a893978413f2cea9307f38f3bbe9c0fa1eddaf3aad
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.com/pify?keyword=geometric+distribution+problems+worksheet+answers'. This technique is often used to obscure the final malicious destination and is associated with SEO poisoning scams. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a phishing or scam attempt.

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=geometric+distribution+problems+worksheet+answers In PDF document text
    • http://files.pp-personalprotection.com/uploads/1/3/1/6/131606435/7533385.pdfIn PDF document text
    • http://nirufazib.marktobin.com/uploads/1/3/0/8/130814070/5565218.pdfIn PDF document text
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.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/1/0431/0525/5577/files/96094955943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/45204463181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/berozebulaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8643/6759/files/tegiperuvejexotenimeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/62165122450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/70143102615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/45237608323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/60302317797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/mavibitekukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/xapow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/mataweroga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/87765081050.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_off000044c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C3 5640 bytes
SHA-256: d19971d550d185268a634da0540a6a684453d29e7286d5348c11a31f01cd9cb7
font_01_sfnt_off000057d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 9572 bytes
SHA-256: 9ad29a161ae7b668dda1d0143b15f7f2d28b7bb211b116dd27b8884729ab4468

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