Malicious PDF — malware analysis report

Static analysis result for SHA-256 0034db657c27fd17…

MALICIOUS

PDF

46.9 KB Created: 2020-08-01 05:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38eb73b96bc81e7c4ed29c002ccbbe98 SHA-1: 67a40cff4db0c3cf7df0739e6c2fd11c6391fbc0 SHA-256: 0034db657c27fd173a088c0551204152b67ae0cfbe393058a569643265efb15c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=google+maps+setcenter'. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection attack designed to lead users to 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.ru/pify?keyword=google+maps+setcenter
    • http://files.allgoodthingsosf.org/uploads/1/3/1/0/131070618/aa0a4e401d4efe.pdf
    • http://files.dance4him.org/uploads/1/3/1/8/131856188/5194559.pdf
    • http://files.thrilltheworldaustraliamelb.com/uploads/1/3/1/8/131856276/xakowajuluxutomeve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/91847949936.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/15839884001.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/zelagebigipuxefelakunubam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/suriworokorudap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4621/files/1640693449.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/62355667694.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/jewedekedanonawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/6342119351.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790d.bin
012b513ad600aadeb740c35e1c91643ea8008be37b2b7b61e922b0596d1040c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x790D 5284 bytes
font_01_sfnt_off00008af5.bin
7402abaf0d414e6ce54ca1d7c013bdc571d1e7bd103da63c0157fca3153a7797
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF5 10552 bytes