Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfe559386f4db49…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 02:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccee1b6eb5e32802fdaebf46d736aae6 SHA-1: 63e7dc15664034788a175495468033fbe5b65f4b SHA-256: 9bfe559386f4db493a851a326390c2b4b66c155e490544af9e5e29a81d9ea10a
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One of these URLs, https://ttraff.ru/pify?keyword=ile+maurice+guide+touristique, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or hosting a large number of redirects 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=ile+maurice+guide+touristique
    • http://files.danafosmer.com/uploads/1/3/2/6/132695663/7078597.pdf
    • http://polefo.theblackwomansocial.com/uploads/1/3/1/1/131163930/moruxevojelixapaz.pdf
    • http://files.theoasisconference.com/uploads/1/3/1/3/131380456/73c2f15b.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.lexingtonparkdistrict.org/uploads/1/3/0/9/130970016/lojosev_sipogaxepok_jabitimun.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/72763741039.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/sukawuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/6992329762.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/28105693440.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/41822592465.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/sovezorure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0160/1444/files/astral_projection_techniques_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/sawozoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/41857253665.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/sizibilukawezuvevibiwasi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/ielts_vocabulary_list_of_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/black_and_decker_books.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_off00006f58.bin
217ea459542af6e628fcf04bbecbf848830eeec8304f46c6c8038a4d6105eb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 5320 bytes
font_01_sfnt_off00008141.bin
26c3b0cfd6653f592e0554a63bc4e154cf8492c39ffe94d25f65a244b3599ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8141 12016 bytes

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