Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e007ef2f433b5b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 15:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca3d19051e614dff9b3c2e17c4f2bcb9 SHA-1: a8245ba3d869593e8540e4008c3c80f0a6e24636 SHA-256: 76e007ef2f433b5b4ec75c19e449f9c99970058c3e42aa80b431da7a8fb7cd2e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=happy+birthday+images++with+quotes, which is associated with known malicious activity. The document's content appears to be a lure, using 'happy birthday images with quotes' to entice clicks. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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/pify?keyword=happy+birthday+images++with+quotes In PDF document text
    • http://files.ravenaterra.com/uploads/1/3/1/8/131860060/2c400.pdfIn PDF document text
    • http://korerofe.trrope.com/uploads/1/3/1/3/131380183/vapufibunuloxovetav.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/1/0430/7540/3936/files/9960222628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/48315858107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/brushless_dc_motor_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/kujeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/45532669694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/70009242535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/sap_merchandising_and_assortment_planning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5059/0627/files/visa_brand_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/guvunetut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/gisiwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/reduce_screen_tearing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/kazujojuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/rojuzoxenizejirevelinaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/jusoruro.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_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 5764 bytes
SHA-256: edcb26553e720835239a918e4942a651d931479f7b3e5edb9b38144f88995369
font_01_sfnt_off00007455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7455 10088 bytes
SHA-256: d50eaa9256071dd3b3eaea6db81bbbf645396d46e8ddffab1c2e59782d8dd090

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