Malicious PDF — malware analysis report

Static analysis result for SHA-256 37af688af1a0838b…

MALICIOUS

PDF

35.0 KB Created: 2020-08-28 17:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5eea708947f7cb42d7129adfcb3ef2f8 SHA-1: fe534b7e92793a3c69ec6c18f9540b5ef22aca40 SHA-256: 37af688af1a0838b83f901e3e989ff3877c2e8757c6eb551bbf6b40fe3169a15
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for link farms or redirecting users to malicious sites. One critical heuristic flagged a link to known malicious redirector infrastructure. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=separadores+de+gosset', which is also flagged as a malicious redirector. The file also contains numerous links to Shopify-hosted PDFs, suggesting a potential attempt to disguise malicious activity within a seemingly legitimate platform.

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=separadores+de+gosset In PDF document text
    • http://bogugured.nounoucergy95.com/uploads/1/3/0/7/130740169/pumutukeg.pdfIn PDF document text
    • http://files.unfitmama.com/uploads/1/3/0/8/130874222/fisufeja.pdfIn PDF document text
    • http://files.realjackoftrades.com/uploads/1/3/1/8/131856009/29c2025ab7e5f9.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/1/0435/5578/2819/files/mukojerobawurobovutuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/68481565582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/collapse_of_the_republic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/40910564519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/32956986244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7070/8901/files/math_antics_algebra_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/center_parcs_elveden_forest_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/kolabanaveniruzixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9812/5976/files/37974415576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/lagu_break_into_the_dark_valentine.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 4

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_off0000491c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x491C 5200 bytes
SHA-256: 7e264b4945072e2efbd7c15dbd58128923fed5cab560774a33bf063abc5db0ca
font_01_sfnt_off00005ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD5 10812 bytes
SHA-256: 0e096cdd4a6c01492183a3e27b3ae08156f42516013800bf438224c03f0f3602

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