Malicious PDF — malware analysis report

Static analysis result for SHA-256 a345b2af193d059f…

MALICIOUS

PDF

37.9 KB Created: 2020-08-01 20:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9820f91624ca52ff67a0c44b1c41f24 SHA-1: 44ab7ba0a9afab84bfa4c986d5c9f6a098f70cfd SHA-256: a345b2af193d059f736966d20d6904347a7442052adca01df3c4418d4a03c2c6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and references to practice tests, suggesting a lure. The primary attack pattern involves redirecting users to malicious infrastructure via embedded links.

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.com/pify?keyword=tera+nova+practice+tests In PDF document text
    • http://files.titanjudo.org/uploads/1/3/2/3/132303010/5637897.pdfIn PDF document text
    • http://files.johnsinclaircustomcalls.com/uploads/1/3/1/4/131406478/4f812b7d.pdfIn PDF document text
    • http://files.grrlsmeatcamp.com/uploads/1/3/2/7/132712334/bef321eb641d892.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/1/0431/9258/2293/files/24900910985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/15704572711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/gasimer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/53090254062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/vector_calculus_susan_jane_colley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/2004_jeep_grand_cherokee_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/89867256479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/ruwofixofobowigomexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/ludufezosamuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/52158994288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/52380776891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/26599075186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/mepodamepun.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_off00005589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5589 4904 bytes
SHA-256: 4856ef12aa5b026513a6815c188c67a2f58d3514c291d4ec0ac882e56ed7075e
font_01_sfnt_off0000664b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 10788 bytes
SHA-256: 4faa561ebe07036f5c336c829da2ea219a423e650fbda171440cb7ab16090f67

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