Malicious PDF — malware analysis report

Static analysis result for SHA-256 681b7c1d9dfef84f…

MALICIOUS

PDF

64.2 KB Created: 2020-07-31 03:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00fb776a14dfac943db0aa9da7fbb113 SHA-1: d06af35389d1f5c4bb1b95925f2c05192af17ee0 SHA-256: 681b7c1d9dfef84f83351c1fb5776cba902ebe00f5df6d72754a93f58dc431d2
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for phishing lures. The document body, though heavily obfuscated, suggests a "curriculum vitae" theme, aligning with the phishing lure. The ML classifier also 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.com/pify?keyword=curriculum+vitae+espa%25C3%25B1ol+pdf In PDF document text
    • http://files.mrtranhistory.com/uploads/1/3/0/8/130814009/c47c18e7.pdfIn PDF document text
    • http://files.positivitymagic.com/uploads/1/3/0/7/130738752/vakebuxetul.pdfIn PDF document text
    • http://files.claycountyhistoricalsocietyin.org/uploads/1/3/1/4/131405976/zasulidesip_dexaja_rukikux_tapepaduzopa.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/1/0430/6924/3553/files/5834559799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/42300285430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/zesajikaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/sajezixow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1889/5010/files/55150726503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/45136153621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/70247727907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/loborebufobojevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/wurekepojabisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/43145062680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/92151014683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CB 5372 bytes
SHA-256: d4a44ccb36864aa37c4b60712a0a1ead22d1d6e6f033fb61634301d7dd59139e
font_01_sfnt_off0000b6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F6 10764 bytes
SHA-256: 06715a7f83433e322861e455c864def826816e66249f2f086c915748ce16754b
font_02_sfnt_off0000dba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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