Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60c7e208f00063e…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 15:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ebf44cb70c3ef2b522a217fa27d622 SHA-1: 8b7c6f53fdc9aa31e0df03ad55bd37e72d0d6651 SHA-256: f60c7e208f00063e0747e683489e5cae6d1114a4dd7b4d44e70916e1c2a92aac
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs that appear to be part of a link farm designed to lure users. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to malicious infrastructure.

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=bulfinch+s+mythology+pdf
    • http://files.pottershouse.cz/uploads/1/3/0/8/130814121/mevupumepo.pdf
    • http://fixuvonot.christinaandcanines.com/uploads/1/3/0/7/130740522/236843016628c.pdf
    • http://files.ericvanbaars.com/uploads/1/3/1/3/131379134/pasixafisesisabo.pdf
    • http://wotosovu.fitnessbyloren.com/uploads/1/3/1/8/131871674/48ce18c.pdf
    • http://files.allexreddink.com/uploads/1/3/0/8/130813855/86dda35d63.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/zamuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/manual_tire_balancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/83454155222.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/belladonna_alkaloids_davis.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/89500767049.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/18109496519.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/16981198944.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/bazozunarazetabexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/wow_classic_turtle_meat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/kixuxatetumir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/romawefitokofavawufi.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_off0000739d.bin
d1d5b19ab57f5fff6a1704495a1f6ab0d15932e211c7448d65851fabc442969c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 5416 bytes
font_01_sfnt_off000085ff.bin
a646c4a502e1b189e7ede1dc3b537a7de208c578c43bc5c0bda032e43c48d983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FF 10368 bytes

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