Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f796a6c67884ea4…

MALICIOUS

PDF

34.6 KB Created: 2020-08-09 11:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 624e1bfc2e9b99d2f5a7f91b94a00185 SHA-1: 160777870bbd3f4b43c857d037c5137609d7481f SHA-256: 7f796a6c67884ea4e77fdaf1f649fb2314eb0a292d0c86fe8e367808ab11227d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body and heuristics indicate a lure related to 'Aitsl professional teaching standards' to trick users into clicking these links. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aitsl+professional+teaching+standards+pdf, which is part of a link farm designed to distribute malware.

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=aitsl+professional+teaching+standards+pdf In PDF document text
    • http://files.dynamicfunctionalfitnessllc.com/uploads/1/3/1/6/131636719/8675810.pdfIn PDF document text
    • http://files.moring-sandojo.com/uploads/1/3/0/7/130776487/bikeju_jitufolenag_totumom_judiw.pdfIn PDF document text
    • http://files.nxtgenerationenergy.com/uploads/1/3/2/7/132740415/sodegebu.pdfIn PDF document text
    • http://files.design-your-self.com/uploads/1/3/0/8/130874627/zezekiviwaxal_ragajadikofesaf_zidoxerigusefu_ferepitofivuwe.pdfIn PDF document text
    • http://files.parkforestmagnet.org/uploads/1/3/1/3/131379111/josexagoxa.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/1/0431/2042/7157/files/wizaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/simajakagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/bash_random_string.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/86197148184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/tatuxegudimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/harvest_moon_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6637/2775/files/best_answers_to_202_job_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/purekezikoxasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/54275996466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/bizuneturu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52876055892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewobaropelizovijekozuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/vadabadi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2D 5408 bytes
SHA-256: 666fbf27cf793f9eae560f0cf66da37c1f21353f26b55b7900d8d25087ffae29
font_01_sfnt_off00005d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D86 9200 bytes
SHA-256: 85b9a931cab89c0f2de9050d8ace868935c8f28bb480ec9a476ca81242f64833