Malicious PDF — malware analysis report

Static analysis result for SHA-256 346b49cc026bb96c…

MALICIOUS

PDF

66.5 KB Created: 2020-08-04 03:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce9bf9663e9bb20ca29fbb8083ae52cf SHA-1: 7001253b87a504d61412a7577e82aef3310252e0 SHA-256: 346b49cc026bb96c018dc0ad4293ed0b7579f345f6f2fec9263bb42ec39ed3cb
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with many hosted on Shopify. The ML classifier strongly supports the malicious verdict. The embedded URL in the document body also points to the same malicious redirector.

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=character+analysis+example+pdf
    • http://files.releasemystress.co.uk/uploads/1/3/1/3/131398362/5bd8362246815.pdf
    • http://files.radmanusa.com/uploads/1/3/1/4/131482976/janununan.pdf
    • http://files.purplepandaglitter.com/uploads/1/3/1/1/131163976/5490222.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/xoxarewofabedil.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/garoxapupilosixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7842/6534/files/r._e._m._fall_on_me.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/69205466064.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/42743919661.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/zalijitisinazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/52582328362.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/87899313484.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/ragupuzoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/texegitole.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/criminal_law_in_ireland_cases_and_commentary.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_off0000c838.bin
0d3880b5bd3a2740c766f435700d1b1940667ca6e140c040da15208256cc9eab
pdf-font-stream PDF embedded font (sfnt) at offset 0xC838 5468 bytes
font_01_sfnt_off0000dab3.bin
bac58101af22701bc08aed61af0b4e048a2b5edc9e39b81152d5e8ea560034f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 10036 bytes