Malicious PDF — malware analysis report

Static analysis result for SHA-256 26beba73ca5f9abc…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 04:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ab5323f67b151b250675eb2f9fe4e04 SHA-1: 9a8926450e20b3e7f134413abe0535a7dd9887fb SHA-256: 26beba73ca5f9abc2e077f4423d4b39c61f698086ab132f125e4ea902f707625
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a PDF link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=hungry+caterpillar+writing+sheets'. The document body, though partially corrupted, contains text related to 'Hungry caterpillar writing sheets' and the malicious URL, suggesting a social engineering lure. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or redirection 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=hungry+caterpillar+writing+sheets In PDF document text
    • http://sikajasif.workingwordsproductions.com/uploads/1/3/2/7/132710714/6834442.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/51855077048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/47484600131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/78174726061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/rabujevirupuguvulisobome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/95534150159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/apa_guidelines_6th_edition_referencing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1622/8761/files/power_glove_terraria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/fonevalosud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/logical_reasoning_practice_questions_for_cat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/15480607453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/23627946887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/fixakupupov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6E 5124 bytes
SHA-256: 42987e37c33e2a6b4c3ccfc5e07a0d9cba4ca271ed4d055cdf04c115b26c73de
font_01_sfnt_off000070dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 10580 bytes
SHA-256: e77a8df9f0b2b0a44b2b48ef4329d0fee778fb8f41b55cae6e809343606492b7
font_02_sfnt_off0000950e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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