Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fec6f499118ce72…

MALICIOUS

PDF

85.0 KB Created: 2020-09-12 17:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db8186c1992c67a917996aa716e145ae SHA-1: f00e32c70452512bc4e531231aace8200a5083c4 SHA-256: 2fec6f499118ce729ae7d11aaca0e931da9d93282edc800c8da34e852458aac0
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, https://ttraff.ru/pify?keyword=biosafety+of+genetically+modified+organisms+pdf, is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains this URL, suggesting it is the intended lure.

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.ru/pify?keyword=biosafety+of+genetically+modified+organisms+pdf
    • https://static.usrfiles.com/ugd/5b9365_bc913601158e42ea8c93678e2b339d14.pdf
    • https://static.usrfiles.com/ugd/f59309_6c6b2512c4074c25a1e86a04081552e6.pdf
    • https://static.usrfiles.com/ugd/3e5db3_541b5cc82aff46bda00f7f1548342941.pdf
    • https://static.usrfiles.com/ugd/2ddd39_1b0cc31a61a0490ba15edc6dc337e832.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/xataxiredeboke.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/95155530462.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/jawibutobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/fusewesaxuluvelod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/puporaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/61555843392.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/70498911983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/anatomy_and_physiology_of_small_intestine.pdf
    • https://static.usrfiles.com/ugd/d5415a_d077a5424cb8427dbf550891c847988f.pdf
    • https://static.usrfiles.com/ugd/a891c0_ddf6198e42d54a57b5a02d6f7d70b58d.pdf
    • https://static.usrfiles.com/ugd/440e29_b5fc51e709d1438c83bba85ef55483f0.pdf
    • https://static.usrfiles.com/ugd/9f69bd_c6cbfe385b2545269d62b2de6c9ebb59.pdf
    • https://static.usrfiles.com/ugd/c6ac46_98db50745d7447d1a691aeef5052000d.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_off00011073.bin
9a2b8d7441b993209067df05897989a08ceee4868c6664d02edd3364a4012dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 5624 bytes
font_01_sfnt_off00012392.bin
ec03614fad9a1a5eb37a487581507b1de25514cd5c28828f4a8e1ace5d47a6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12392 10076 bytes

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