Malicious PDF — malware analysis report

Static analysis result for SHA-256 f577e577a95b926a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-21 12:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07946d53ebc001613e3fdea62b50930 SHA-1: 967d41b531cfc3a011e82843446f8c57469d667c SHA-256: f577e577a95b926a822184f5e546ff8d62cadeb396ce18a71736d59a934ebe8e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=soul+searching+bazzi+song, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=soul+searching+bazzi+song
    • http://files.charlottes-eportfolio.com/uploads/1/3/0/8/130813768/a8648d2f7a6.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/xiromeginusubana.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/treasures_of_pandaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/4809708084.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/rutedozifatavofedujim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3419/files/apush_chapter_10.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/7298056558.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/cloud_games_cracked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8218/files/xifawozusujop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7577/files/weekly_calendar_template_word_doc.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/6477658236.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/jerupot.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_off00006a05.bin
8af8ff32d9b21379eb20080cfbce30bd3776cc40b7aec868a7a8a6b73640a635
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 5352 bytes
font_01_sfnt_off00007c31.bin
aabc04b857df973ff92acf07008c05fd5a72e68c051ff131fa8e129c8a0e3071
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C31 10320 bytes