Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf1760ce6b0959c…

MALICIOUS

PDF

32.4 KB Created: 2020-08-11 00:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 170f2c375ff0ddeb9b41797553a65771 SHA-1: 8aa563335dbe13fd89c35573ea07d27b19ddd562 SHA-256: edf1760ce6b0959c711cc2ac41fd517be431ef80b5a7772cff2b6559a7d30635
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL that is also present in the malicious redirector link, suggesting a lure to download content. The ML classifier strongly indicated maliciousness.

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=download%20buku%20fisika%20kelas%20xii%20marthen%20kanginan%20pdf In PDF document text
    • http://files.mountainairdance.org/uploads/1/3/1/4/131437532/1947269.pdfIn PDF document text
    • http://files.crowlitmag.com/uploads/1/3/1/6/131606431/48df6b4eaf408cd.pdfIn PDF document text
    • http://labaforif.albedooshrine.org/uploads/1/3/0/8/130874493/4270492.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/1/0444/4022/3911/files/bank_job_application_letter_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3398/4162/files/8560546920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/43739465109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/jojefubakoros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/99466571546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/pujinosoxam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/dekeregeruzovijipazuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/diy_laptop_stand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/approximation_for_ibps_po.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 5

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_off00004247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4247 5820 bytes
SHA-256: 9c66be1ec367586d37e41983ef5e8b217511e1a66e4b0b6cc707d4fc36d3ab47
font_01_sfnt_off00005603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5603 8980 bytes
SHA-256: 087e8b2f3b83c0859e50b897ae0cae0e5506a86442228ef62a841bad7974e541

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