Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f591c62f583732…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 03:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771d05f7316512f811284f9d7ade57f0 SHA-1: a4c6d3b2577972ef13c5d7643fbe0e2582b7fdc9 SHA-256: 10f591c62f583732fe5cb302eaaac04b6c77483a9ebaf74b0aa4fe90b85faf55
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body and heuristics indicate an advance-fee scam, likely attempting to trick the user into visiting the malicious URL under the guise of a lottery or parcel delivery notification. No scripts were extracted, but the presence of embedded URLs and the scam lure strongly suggest a phishing or redirection attempt.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=caligula+camus+pdf
    • http://files.kanelaandcompany.com/uploads/1/3/1/3/131383247/7864520.pdf
    • http://files.sbrmga.com/uploads/1/3/0/7/130739684/zelusosiwetug.pdf
    • http://files.carpetcleaningsantabarbaracounty.com/uploads/1/3/1/4/131408954/fetezi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.fontrix.comhttp://www.nhncorp.com
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/44097946313.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/free_japanese_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/enlace_quimico_ionico_y_covalente.pdf
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/libiziwitewobujagum.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/pubifigujusumusinon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/manexerixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/75982172345.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/rizobanojit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/semolusumawugadoboni.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ac.bin
48a69edbbd3e6654cb49d61d7ab31c9d77875c16d45a2fd3e457342f8a8555d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 5284 bytes
font_01_sfnt_off00007393.bin
b51673caade2b5785783c2c216b20d04b655c81898b7bcd07e8f9e4ccbe40578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 2172 bytes
font_02_sfnt_off00007cf7.bin
8f759916a026dcb7d7b15d08876993652e5ce7a8fda7b44d6a14ecbc656bcc08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 10076 bytes
font_03_sfnt_off00009f38.bin
820dfc95959b986e55016386a11c9b66f474bd1c78ce618d8d26f9cf3e1b427a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F38 2088 bytes

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