Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2903522bc36d88…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 11:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e927e78e67bab98d78be327b4f1a5c74 SHA-1: e67e1eceb2e6cec601ad43ce17675ee2b6574385 SHA-256: 9c2903522bc36d889605ad729ccbfa5fd433b0ff95252a5147819a9679fb602b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=triumph+bonneville+t100+parts+list+pdf', which is also flagged as malicious. This suggests the document is designed to lure users to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=triumph+bonneville+t100+parts+list+pdf
    • http://nopawoxa.pureblissbodyconfections.com/uploads/1/3/1/4/131437792/62d49ba7dde.pdf
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdf
    • http://files.brocknorton.com/uploads/1/3/1/4/131406181/dubisipivide-tewiroguxakow-wojedobo-fomudagogudej.pdf
    • http://files.newkirkbc.org/uploads/1/3/1/3/131379899/6f90aae3d85.pdf
    • http://sijawo.floraelmore.com/uploads/1/3/0/8/130814328/tokezuxalaxaxa_lekatinuro_xudadawo_ketabobogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/23176284978.pdf
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/lost_artifacts_of_greyghast.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/windows_system_administrator_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/brokenness_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/jagufitalogipun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7448/5401/files/deforestation_causes_and_effects_essay.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/dajegig.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/relebafuvotukeketuzapino.pdf
    • https://cdn.shopify.com/s/files/1/0436/9268/7513/files/canara_bank_credit_card_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/3192578147.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/vadotesidexebirenora.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005732.bin
bde9e06ce41546d687de37e35939fe07d9d150fc3a7a1f6d32683190b2e9b51a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5732 5624 bytes
font_01_sfnt_off00006a24.bin
dd3f4a53195fd00577f452cea686c11788a304e91c6bf899014bcfd9ec8447f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 14940 bytes

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