Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3b57e6302d982c…

MALICIOUS

PDF

32.6 KB Created: 2020-08-12 07:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba3a6b50290463b4e042e2b0203e10b7 SHA-1: f4185857a4e5a57d9e3b586fae0a9bef185ddfcd SHA-256: 8a3b57e6302d982cbdc01403e898369da81e25de76d49db29e98b2a0a9042d3b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily corrupted, contains keywords related to a product manual, suggesting a lure to trick users into clicking the malicious link.

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/wb?keyword=olimpia%20splendid%20unico%20star%20manual In PDF document text
    • http://files.learningforcharity.ca/uploads/1/3/2/6/132695432/8496480.pdfIn PDF document text
    • http://kuwule.kesara.org/uploads/1/3/1/0/131069934/kemufewotuvemiwij.pdfIn PDF document text
    • http://files.johnsonhousebullies.com/uploads/1/3/1/4/131438464/zuragitetikumitataku.pdfIn PDF document text
    • http://files.bickley-green.com/uploads/1/3/2/6/132695321/25d481.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/1/0436/9845/4682/files/pewofafanedixeteruseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/sawoxaduzanufifamixinoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0165/4935/files/visual_studio_code_change_terminal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/fejorexerolifuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/zanokalisenifapovezakok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/vanivajepiradevawizevero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/pension_actuarial_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/loving_yourself_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/raferonufopuvusevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/15232373026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/11462540569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/61224239954.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_off000044c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C1 5248 bytes
SHA-256: fd7d0646c584030ba68a0548607886b97e3cdfb92da9fc822ecb79b93f6aefb6
font_01_sfnt_off0000566e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566E 9112 bytes
SHA-256: 4c0889211e31fa3c72886484b07cb7af0ecf68c89fa5e71d9e921262a1449f18

Open this report in the interactive analyzer, or submit your own file for analysis.