Malicious PDF — malware analysis report

Static analysis result for SHA-256 05043ff8cd533429…

MALICIOUS

PDF

35.6 KB Created: 2020-08-03 21:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5afe1fb59cc885a0ca306554baa6bfe5 SHA-1: 46c471ed6b674d5d471eab4f88ef4de2537d321b SHA-256: 05043ff8cd5334297baafb5f641ed474b008812e3d1450117abfdf0ef01ade02
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=pdf+to+word+farsi+support+online'. The document body and embedded links suggest a lure related to PDF conversion services, which is a common tactic for phishing or distributing further malware. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports this assessment.

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=pdf+to+word+farsi+support+online
    • http://files.bluecollarhomeschool.com/uploads/1/3/1/4/131454090/xipazegalijivuw-bivosokowe.pdf
    • http://files.charleighwrenco.shop/uploads/1/3/1/3/131378838/3841231.pdf
    • http://files.washakiecd.com/uploads/1/3/0/8/130873758/wafipimokaxeka.pdf
    • http://desolo.ambreepresentations.com/uploads/1/3/1/3/131379732/ab7e5da2ff60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/93519953855.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/71585005950.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/jaxugoxufeparifudoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/difference_between_ospf_and_bgp.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/tifujifubadakomovaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1065/2317/files/pitivasirutak.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/maxurisikupov.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/tegupafufodiveg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/rujefosopitonosozutova.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/3710972151.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_off00004c36.bin
a61f00b8d2baa7c9472550f8aec290499f522da4e38934087176feedc4b3cb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C36 5128 bytes
font_01_sfnt_off00005dcc.bin
5a39c0c29c9b3c31d1836ccf23fde77bbfa4f4c63a5cab982c8b5a458cf4c21e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 10344 bytes