Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c2a5a84cbfeaa1…

MALICIOUS

PDF

47.7 KB Created: 2020-08-06 21:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36637309b24fe80e3468d31b20e0c527 SHA-1: b3221c455a4dc5bc808eed92f0d6d9e65ec16b26 SHA-256: 73c2a5a84cbfeaa1fce8e3abeec513fc0d5f79cd3e56bb5cbd3b045538862854
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=encyclopedia+of+automotive+engineering+engines+fundamentals+pdf'. This redirector is likely used to obscure the final destination and potentially deliver a second-stage payload. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to deceive users into downloading further content, likely malware.

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=encyclopedia+of+automotive+engineering+engines+fundamentals+pdf In PDF document text
    • http://files.lifetransforminghabits.com/uploads/1/3/1/4/131482926/roxojebusenije.pdfIn PDF document text
    • http://files.jambandpurist.com/uploads/1/3/1/6/131637131/555d9.pdfIn PDF document text
    • http://files.lissalubinskimd.com/uploads/1/3/1/6/131637649/decb6b2582cafe.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/1/0429/0985/9999/files/45131009596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/vedas_in_marathi_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/lerezukubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/refipenudofepidadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/24296924463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/41379477461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/99082913200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/tavagiduva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/nolemuseni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/deenbandhu_biogas_plant.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 5596 bytes
SHA-256: c9febfc65cacf03953c35cb3b41f50c977840bbca1b257fd8944f786f2217fea
font_01_sfnt_off00007919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7919 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off000082e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E4 14888 bytes
SHA-256: 314bba18db32c300456c5c597effe90949a11ae58618359055c042a2a2ad8877

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