Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a70a99d6e23d04…

MALICIOUS

PDF

45.8 KB Created: 2020-08-09 07:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df4115cea389166152dd488a4bcd4ac7 SHA-1: 68c40fd523ea0eead4175e9d107fa78d98d48695 SHA-256: 56a70a99d6e23d043f2df0b2d5a4315b68bc3e9f95d318736a153bf0ed949a91
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a link farm with numerous external PDF links, a common tactic for SEO poisoning or distributing malicious content. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the primary malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages.

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=apprendre+python+rapidement+pdf In PDF document text
    • http://files.wrhg.co.uk/uploads/1/3/2/6/132681992/zuxizifopotipo.pdfIn PDF document text
    • http://files.nationalinnov8tive.com/uploads/1/3/2/6/132682230/b9131e04.pdfIn PDF document text
    • http://files.theletterstringquartet.com/uploads/1/3/1/4/131453793/b1e0cbe.pdfIn PDF document text
    • http://files.kopou.org/uploads/1/3/2/6/132695915/80a0c.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/1/0437/1103/7591/files/dragon_quest_xi_soothing_seaweed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/inches_to_mm_conversion_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/72888913079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/97143217218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/48581321741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/alter_ego_a1_exercise_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3012/2393/files/estrategias_de_aprendizaje_visual_auditivo_y_kinestesico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/11618264051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/70209407083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/15882423681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/repomufasilulozakebak.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 8

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_off0000726d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 5164 bytes
SHA-256: cb03cd5219e33a290abce825ab91f1b4858777a043a909dc9230750ef4b37eca
font_01_sfnt_off000083e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E1 12300 bytes
SHA-256: a0c14a0254bd9c82ed7839aa8fc7f672440955f1a943f35bff6396b5d4949395

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