Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a457c5349faa1c4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 01:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edf365d0567302036d28060020f17c99 SHA-1: b12befbec5cfa73a96bb62204fbd913cd263c643 SHA-256: 6a457c5349faa1c4c2cad422ffdba890a6ad87944f64945abda5ddee403161ee
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=new+buffettology+pdf'. This indicates a phishing or scam attempt, likely using the 'free download' lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document structure itself facilitates the malicious redirection.

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=new+buffettology+pdf In PDF document text
    • http://files.bethsecristbabywearing.com/uploads/1/3/0/8/130874559/ruramurufinigo-wuxiwuvade-sebagun-vakagasetep.pdfIn PDF document text
    • http://xifeb.dokartistspace.org/uploads/1/3/0/7/130775934/guvetozonuko-pewuruwu-jigosinal-genem.pdfIn PDF document text
    • http://files.newmtmoriahamejax.org/uploads/1/3/0/7/130776295/3055740.pdfIn PDF document text
    • http://files.autumnselover.com/uploads/1/3/1/8/131856318/613692.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/1/0434/0681/9477/files/23223256624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/electronics_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0971/9965/files/vufikene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/android_apps_making_tutorial_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/savoliwowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/bumaloz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/jimewikulukemupuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/general_prologue_to_canterbury_tales_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/19813879759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/49001153860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/pipepem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/destiny_2_leviathan_underbelly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/mips_for_loop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 4756 bytes
SHA-256: 5934faa8f4e0914ed25ba9c4e204fb9b9e650cedfca26425fe6d3c10fc6349b4
font_01_sfnt_off0000756b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 10316 bytes
SHA-256: c79daa36139bc457fc96bd589040a7f7661251a7505a3b249d36beabf8a85c9d
font_02_sfnt_off000098a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c