Malicious PDF — malware analysis report

Static analysis result for SHA-256 6344a4186643f2e2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-17 02:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 022da7f771f11bfa015f376300b68ccf SHA-1: 58475f0d6a568bae1640ceb8ba41e21499d520c7 SHA-256: 6344a4186643f2e2c17ddbc2145a94dd3edc7d3ae07eadcc6e4f1d1b24cb80c4
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and heuristics suggest a lure for free downloads, likely a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

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=modern+big+data+processing+with+hadoop+pdf In PDF document text
    • http://bewalep.lifeasabowhunter.com/uploads/1/3/0/9/130969634/8942486.pdfIn PDF document text
    • http://files.bysamanthajo.net/uploads/1/3/0/7/130740212/xujijaxox.pdfIn PDF document text
    • http://files.kurtfit.com/uploads/1/3/1/3/131383743/4066736.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/1/0427/7728/0671/files/fuwagetufeziripevot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/calcitonina_tiroides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3085/1233/files/atomic_structure_and_periodic_table_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/masolonanaxirigaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/74808892106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/99486584398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/jajixewomukiretekinufusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/6995223747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/84356327244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6544/9365/files/12288650474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/86610203793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/kewagalekoroxusoratuniti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/98338348124.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2 5620 bytes
SHA-256: 0b80d4c13ae3eb1a1b95d0d64ea3e36dc799de8d22070d7945e89925f5bb81f5
font_01_sfnt_off00006810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6810 9740 bytes
SHA-256: 387878b464b84c8386fecb4af02d045328b86b39c86ccd48a62f84222b0e47c0
font_02_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 18084 bytes
SHA-256: e5eb930d65907a6ee68c4c0e6a57ffd0e7862a55674a1463eed604c6320a778f