Malicious PDF — malware analysis report

Static analysis result for SHA-256 183f00e7c17a275b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 13:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 793efc61b8ed0eac326a0eb63646b3f8 SHA-1: f2b34798a5334240360ae079c3ae72a72ea4e421 SHA-256: 183f00e7c17a275b4c39c695a1d65b2cf2177439248c377ef0b56c92c3f908ad
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be an SEO link farm designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of this redirection scheme, suggesting a phishing or malware distribution attempt.

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=ajax+tutorialspoint+pdf In PDF document text
    • http://files.cleancooks.org/uploads/1/3/0/9/130969206/pepejipator-nepotan-vevim.pdfIn PDF document text
    • http://files.cedarsmontessori.com/uploads/1/3/1/0/131070151/3228115.pdfIn PDF document text
    • http://files.dennisglover.net/uploads/1/3/1/4/131437285/5801829.pdfIn PDF document text
    • http://fizep.otto-and-olive.com/uploads/1/3/0/9/130969742/c880a7ad8af95.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/1/0431/6567/9776/files/pozowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/78761839448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/rusogerazuzemarowomobob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/zevukumulugobira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/importerror_no_module_named_packaging._version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/gezijufesugigiperuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/59548916748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6115/files/zonenit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/litakomofaliwugelabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/xray_resource_pack_1._12._2.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 7

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_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 5168 bytes
SHA-256: 743465d29697cf476c795c6886ffd64794b82d5e63c874864793c862d4e92c45
font_01_sfnt_off0000715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 14344 bytes
SHA-256: 6b9d0bdbc1a7c732675401e44e0e7a256b955efd12f7489fe4969ce76fa91dda

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