Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca58d37820acae78…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 19:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7f4847a90575cd91c4ae6e39cc35fda SHA-1: dc80d6b61795e11bed90608e38e68252412fa2ac SHA-256: ca58d37820acae78f2172db45aecab53153f80ead75757269d78efca276e3fa8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URL points to a known malicious redirector, and the document body contains numerous links, many of which are likely part of a link farm designed to obscure the true destination. 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.ru/pify?keyword=darpa+exacto+guided+bullet In PDF document text
    • http://files.0-projects.info/uploads/1/3/1/3/131398374/ffb74e0.pdfIn PDF document text
    • http://files.skyesthelimitphotography.com/uploads/1/3/0/8/130815026/9962355.pdfIn PDF document text
    • http://mofoj.customer1stelectrics.com/uploads/1/3/1/6/131606289/taredubemabapo.pdfIn PDF document text
    • http://muwekix.aleahkouryart.com/uploads/1/3/1/4/131437724/ribitag.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/1/0431/5709/4551/files/it_s_just_like_a_mini_mall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/54971769066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/fokulotorafedubigesar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/34174741194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/28723949325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/zowiwetinarifikonov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/10008682773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/poguzagegibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/69896850173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/74196692427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6522/0003/files/konubifotomogasijevos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/blockchain_programming_with_javascript.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 4

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_off00006e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 5268 bytes
SHA-256: cef43c4068015b9cc8cf5c6170ebc97b2bd0a0b5521c6e62d1937757824c879f
font_01_sfnt_off0000800f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800F 10324 bytes
SHA-256: 0442ad394b377f8b0999955bf09f781cc1e85914ecace29ca220477879d862ef

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