Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac121e26767733d…

MALICIOUS

PDF

61.1 KB Created: 2020-08-06 07:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83687a51a96f358b95c57621f52322bd SHA-1: 0da6c39d243c9164de6a83f6d808392b42f7e85c SHA-256: 4ac121e26767733d672f23ec1edcd799238e69d47c952ea15b5d4f1affadb500
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links directs to a known malicious redirector, 'ttraff.cc', which is likely used to funnel users to further malicious content. The document body, though partially corrupted, suggests a lure related to 'psychiatric drugs pdf'. No scripts were extracted from this sample.

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=list+of+psychiatric+drugs+pdf In PDF document text
    • http://files.foodforthoughtandprofit.com/uploads/1/3/1/4/131437724/reguwed-kulalegopul-noxosu-warajimaxirabo.pdfIn PDF document text
    • http://files.heatherbrittonphotography.com/uploads/1/3/0/8/130815026/e78fdfbe.pdfIn PDF document text
    • http://files.reinamorapuertorico.com/uploads/1/3/1/4/131409200/882628ee57bc4.pdfIn PDF document text
    • http://pisifen.920cattle.com/uploads/1/3/2/6/132695384/fozuwagajedasa.pdfIn PDF document text
    • http://files.bridgeoflovellc.com/uploads/1/3/0/7/130775292/moraw.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/1/0428/9154/2681/files/6723616217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/46742649358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/98938045849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/rujibom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3549/0466/files/puturadanerum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/93927321668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/43442178230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/99162185628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7875/4199/files/sufak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/30277840358.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_off0000a419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA419 5428 bytes
SHA-256: cb8d54afa078f23d5708528f84e4c4b9d04a8a114391de2f3c9c0a4f4aeb6f8d
font_01_sfnt_off0000b69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69D 15644 bytes
SHA-256: cd7a274616a8c428a06ac21d008724268364c3e67ba9ccc33414266730495c67

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