Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1c1ba5461ad166…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 18:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b3d69ca584d058fcc7ace3ef58363ac SHA-1: 9e06ef5603467b94d588874e889d7afbae8faba4 SHA-256: ac1c1ba5461ad1666754aa0f1f45df6100e768fd7bde8ee1bc208b3eaa4ac0cc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=types+of+communication+networks+in+organizations+pdf, which likely serves as a lure. The document body, though heavily obfuscated, contains references to PDF files and the authoring application, suggesting a document-based delivery mechanism. The presence of numerous external PDF links points to a link farm strategy to distribute 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.ru/pify?keyword=types+of+communication+networks+in+organizations+pdf In PDF document text
    • http://files.darianterrell.com/uploads/1/3/1/4/131437941/1442669.pdfIn PDF document text
    • http://files.willarmstrongart.com/uploads/1/3/1/3/131380596/af94473.pdfIn PDF document text
    • http://files.williamsnursery.shop/uploads/1/3/1/6/131606687/sijinavatovamun_lolodomasowunas_negumupifoveg.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/1/0429/2182/0313/files/71941437889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/45205783669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/46495301500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/mipovaximesikatovibitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/25615480153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/literafuguresonozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8485/8022/files/segredos_do_alcoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/geological_processes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/bitezisepewezitizodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/93103716873.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_off00006d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 5700 bytes
SHA-256: cd9bc125fdca96ff85303b3984a8e6ced02cc50f0f843e1216ae9d40c1403e51
font_01_sfnt_off0000809d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 10832 bytes
SHA-256: 4b95913b4c259b71dc2ec121586da9d8ba6eca943662d8b5053963c3db83daa8

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