Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff41d631f28b1a3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-31 12:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db707b82a638a0fd3353d1d2f67c9d70 SHA-1: bb650bcbc5c2e970ed2bc9400f9202acb17794ed SHA-256: 2ff41d631f28b1a394f8a4ec565aa78642167762b98ed6a27497ed0cf260acad
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'boat loan calculator bankrate' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious content.

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/wix?keyword=boat+loan+calculator+bankrate
    • https://static.usrfiles.com/ugd/f3ecbe_1de3f28d58814d96b443ca760bd2882e.pdf
    • https://static.usrfiles.com/ugd/a64c8c_06520ef9edfd493c894ac43eeb88579c.pdf
    • https://static.usrfiles.com/ugd/4ae4db_c187e67ee434482faf6de4ccd6d1f48f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dfde6b7e6ba423ebd9d6265d99f01ae.pdf
    • https://static.usrfiles.com/ugd/3fc21f_df19fc8cc5534078be7ee82243c16fd1.pdf
    • https://static.usrfiles.com/ugd/a64c8c_6f96fcd210364b3d8af1dc86cf044a03.pdf
    • https://static.usrfiles.com/ugd/c3548c_f78fd319b2b34937a2fe2cc126ba4787.pdf
    • https://static.usrfiles.com/ugd/0aab01_21b3dec1954748a583ca937e377bd90f.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/programa_para_unir_softonic.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/vodepalevipagikukir.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/centurion_gate_motor_manual_programming.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/tezikexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/99404609634.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/12328130718.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/12923483719.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_off000061d6.bin
2afc055815a884ab4bfa8f96c005670af9d0a843ab9be819541624385e731478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 4704 bytes
font_01_sfnt_off000071df.bin
d3b06ff35daba3c2c1bbf329bbda118215658d5a246fd7381667851bec231599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 10416 bytes
font_02_sfnt_off00009571.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9571 4324 bytes

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