Malicious PDF — malware analysis report

Static analysis result for SHA-256 823d629be1738515…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 13:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 197bc22314b7ded6bdfdeecf32ab5502 SHA-1: 5652cf640fcf745d521fd2b98b231f8947d3685d SHA-256: 823d629be1738515cfa05050fdd3964b6bde8ef24b713011138191b6fd993655
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a phishing or scam attempt. The document body, though partially corrupted, includes a URL that appears to be a lure for a 'calibration procedure'. The presence of a malicious redirector link and a large number of external PDF links strongly indicates an attempt to lead the user to malicious content.

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=inside+micrometer+calibration+procedure+pdf In PDF document text
    • http://files.greenkeyconcreteforms.com/uploads/1/3/1/3/131380146/sidisoguse.pdfIn PDF document text
    • http://files.iljadecoster.be/uploads/1/3/2/7/132710783/5598275.pdfIn PDF document text
    • http://files.denismorella.com/uploads/1/3/1/4/131406049/cb888.pdfIn PDF document text
    • http://files.goldstatus-of-arts.com/uploads/1/3/1/6/131606727/xatakonanipidog_wetonezuwagu_returon_velitawawure.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/1/0429/3866/3079/files/22273496337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/77508499856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/xipazuwegav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/75966954639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/jepiwavoludosositujopulol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/luzexemepovipapexefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/zogosimokodonevepamudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/direct_tv_redeem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/35326396677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/66901643036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/49779462399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/zekuxivupezesabusezip.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 6

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_off00006edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDC 5380 bytes
SHA-256: 447841e1bf43fb67111f40494311a8c551b6db826802748cbd30a47882ba2026
font_01_sfnt_off00008107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 10040 bytes
SHA-256: 104fe40553794bb0463ae04afc6255f0c5ea8f3f4e66bfbe85b9a71101a2779e

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