Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fe11af38efb678…

MALICIOUS

PDF

48.3 KB Created: 2020-08-10 15:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbe0383affcca43d8e5bf71b68052b7 SHA-1: 40588f970a890c15c49ca6012dce0691c1b9167f SHA-256: 29fe11af38efb678d98a24b2a9f202224eacf3e934b53e783578d44114fd83aa
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for free downloadable content, specifically a bank exam preparation book, which is a common phishing tactic. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=mb+publication+english+book+for+bank+po+pdf+free+download
    • http://files.stampsnotstuff.com/uploads/1/3/0/7/130739247/juporologa.pdf
    • http://files.judymtomlinsonphotography.ca/uploads/1/3/1/8/131872138/midumafeganabagosutu.pdf
    • http://bovila.beurownreligion.com/uploads/1/3/2/6/132682883/baxibufujo.pdf
    • http://files.weswilkinsonplumbing.com/uploads/1/3/0/7/130775265/4897361.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/54797625839.pdf
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/certified_kubernetes_administrator_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/dinedarutul.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/gamejufabiguborosewutatif.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/a_journey_through_anglo_american_literature_answer_key_module_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/58878119322.pdf
    • https://cdn.shopify.com/s/files/1/0431/8203/1007/files/44719290245.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/faduneresikiwafar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54277330936.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/joxisidi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006027.bin
460d73e092f5ac85d5f54e3a3208fbe109976d6d37274509169586fa9ab0e9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6027 5716 bytes
font_01_sfnt_off000073a3.bin
69933559b462b1586802c0be8cbc2462bae2b4ba6421324d5644ca35ae02cad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A3 10660 bytes
font_02_sfnt_off00009814.bin
b098e929d8a0c5451b821a6066890b9d44c9d9ffe553b2c7484e75cc50c9b072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9814 8144 bytes

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