Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c920636b3766a8e…

MALICIOUS

PDF

62.4 KB Created: 2020-08-10 06:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8324d39aee82ab837d40c87dec49313 SHA-1: 5da9a861c50a8c5d1ac9db2191624dbc951202ea SHA-256: 9c920636b3766a8e31f7b247cb8d13c403f59f7e783d947688534af4e3ac8efa
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=what+is+bearing+capacity+of+soil+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bearing capacity of soil pdf' and the URL itself, suggesting a lure to disguise malicious redirection. The PDF structure and embedded links are indicative of a phishing or social engineering attack.

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=what+is+bearing+capacity+of+soil+pdf In PDF document text
    • http://files.josephmace.com/uploads/1/3/1/8/131856170/vafawi.pdfIn PDF document text
    • http://files.mjmoments.com.au/uploads/1/3/1/3/131383384/soxamew_mikiputejebirub.pdfIn PDF document text
    • http://files.chrismayne.ca/uploads/1/3/1/8/131871494/4020624.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/1/0430/1045/7753/files/44476317593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5788/0994/files/digestive_system_organs_and_their_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/mawiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/zekid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/90535571675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/ketowigedekelupex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/48430369915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/govasuzemuwipexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/nuwireniregamom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/7895424094.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_off0000a827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA827 5672 bytes
SHA-256: 1cce3d0ec336f98b322efac579c250dbeb7234c6268acb686c7521235e8d35f6
font_01_sfnt_off0000bb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB85 16004 bytes
SHA-256: 12eb537741798c732969ddeeb3a034ee856fdf8af4af35de44e295ea114119c9

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