Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f01095382e3670…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 10:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67cdbcf7b2dcf5d1e8b9cb85389a0955 SHA-1: 8dee46bbaf178fa4dfcb12d66d96fad05ed7cd90 SHA-256: 09f01095382e3670534540fa76affcc9d1bafac362e78a27705fc4f9b66105f0
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links, including one pointing to a suspicious domain, suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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/wix?keyword=the+legal+environment+of+business+cross+miller+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/fazatep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/28523798152.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/adsorption_isotherm.pdf
    • https://cdn.shopify.com/s/files/1/0438/5321/7942/files/clinical_pharmacy_roger_walker.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe522e3589b548c8a71564471d40eba4.pdf
    • https://static.usrfiles.com/ugd/c83fdb_c19c53a9b0cd4c1b9d4383c1209a0097.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2298079133140999817f0eb7840f75a.pdf
    • https://static.usrfiles.com/ugd/bb13a2_33da0cf06c044b27a36699cec1d573bc.pdf
    • https://static.usrfiles.com/ugd/3e9e83_0c57274910d5463792472bbd7870bcca.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f49d37fb594763bca7091127031944.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d5dd246441c480084120293746d496a.pdf
    • https://static.usrfiles.com/ugd/b8c837_786df7fde3b647fda9709b813914d8c2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004941.bin
d21f45c5ffc13d71c9c8db5ddf748b7d2ef0f7f11121d54097b5796db5420299
pdf-font-stream PDF embedded font (sfnt) at offset 0x4941 5600 bytes
font_01_sfnt_off00005c19.bin
930f62ae08205b044e876391fdad98331cb10463987a5851ddf5278cd2a3568f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C19 9932 bytes
font_02_sfnt_off00007e0c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0C 4324 bytes