Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fe13c8899f316c…

MALICIOUS

PDF

66.9 KB Created: 2020-07-30 11:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19255e05c07b8bdaec566b0ee549f582 SHA-1: 38cdd232843cca25283e50ef3d687f07106fd758 SHA-256: 87fe13c8899f316c16a473c23081105814bcc25e9ab592d0e9ef48f85dfd63fb
194 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.cc'. This redirector is used to lure users into downloading further malicious content, likely disguised as educational materials. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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.cc/pify?keyword=sslc+english+grammar+questions+and+answers+pdf In PDF document text
    • http://files.greengripholds.org/uploads/1/3/1/4/131437085/tuxud-zudumejobifu.pdfIn PDF document text
    • http://files.markwarrencoleman.com/uploads/1/3/1/3/131380771/xiwuzoz_wipita_kozonabikebebin.pdfIn PDF document text
    • http://files.soilandwater.nyc/uploads/1/3/0/9/130969339/bd205cee.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/1/0434/6963/5734/files/78271833417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0496/files/nazotutexujunewid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/42011745204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/87955982598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/dopadulujubepolematufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/liwuxitadoweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/rejajavij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/93171997084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/mubaxutijakilaminajekog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4388/1114/files/guwijigedamupawapupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/47951351140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/vakus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/wijetugawos.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 2

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_off0000bcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF9 5772 bytes
SHA-256: d830bb581a653189460c790ffa900921ec7be58e7b0a056aeb9d9239fec248ae
font_01_sfnt_off0000d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 14516 bytes
SHA-256: 6675bf5019f60df62d91eb68dedac89cda143ccace4e75d5bd80bbc5724c10ab

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