Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e493bde6109cc1b…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 10:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52f6f7c6ff94764a2da3d0cac4587239 SHA-1: fb5791a0ef8cb03b595e9d6cf5f97134a4c044bf SHA-256: 4e493bde6109cc1b996b498cc6a23483e3305e3e1d8b157c390559aa3c0f9cb9
194 Risk Score

Malware Insights

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

The PDF document contains a lure related to "Blue Cross FEP prior authorization form" and embeds a large number of external links, including a known malicious redirector at ttraff.ru. The document's structure and link farm indicate a phishing or redirection attempt to malicious infrastructure. No scripts were extracted, limiting the analysis of direct payload delivery.

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=blue+cross+fep+prior+authorization+form In PDF document text
    • http://files.hillcrestbaptistchurch.info/uploads/1/3/0/8/130874422/8770376.pdfIn PDF document text
    • http://jifenovox.mcleanboosters.org/uploads/1/3/0/8/130873995/wiregaduwipodire.pdfIn PDF document text
    • http://degurare.koubasystems.com/uploads/1/3/1/4/131438216/8174872.pdfIn PDF document text
    • http://misum.pkltimbersurfboards.com/uploads/1/3/0/7/130738799/bipotoduduru-bitokuzaba.pdfIn PDF document text
    • http://files.loveyoursass.com/uploads/1/3/0/7/130738825/tumaxataxusixivukexa.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/1/0429/7352/8213/files/9625308922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/95189922392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/my_dog_skip_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/dasidapazafugilabive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/js_string_contains.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/53034185163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/free_sports_id_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/adelaide_showbag_guide_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/convert_to_jpg_online_high_quality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/10050126742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/the_longman_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/gems_of_war_kingdom_power_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7418/1537/files/tekediwenemesowivasavifur.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 5

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_off000051bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51BD 5356 bytes
SHA-256: 4b81747c4d6c736a14cda3e044195ce450ace4945ade3d987f06e0e29193ce6b
font_01_sfnt_off000063c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 10120 bytes
SHA-256: cd14fb8d98023b4bd21f3becbeb64c84ec27f6a4d34080e4e2029068489f8c53

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