Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f92a6f277fa6ff4…

MALICIOUS

PDF

59.5 KB Created: 2020-08-13 21:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0901ef67832c8485d0c69256d0f4f6e0 SHA-1: 89ee5b035518690841ecaa5ca0badd202571fb6e SHA-256: 7f92a6f277fa6ff42444354f2acd2cd2a007c0daec9de0b7d703f349cde9fae3
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=anjali+anjali+pushpanjali+instrumental+song', likely serves as the initial lure to a malicious destination. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=anjali+anjali+pushpanjali+instrumental+song
    • http://files.bootstompmedia.com/uploads/1/3/1/4/131406060/6ffd548c795603.pdf
    • http://files.bradscedarshop.com/uploads/1/3/2/8/132814241/6465283.pdf
    • http://nuwubadi.fullcirclemaa.com/uploads/1/3/1/4/131437308/rafulafixowolo_vopevonumiraz.pdf
    • http://sikopu.mentertainmentgroup.com/uploads/1/3/1/1/131164250/dilatopesetipavixem.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/ruwakeroleniwemuguxese.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/xelabapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/51551506247.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/reading_strategies_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/ielts_writing_task_1_general_samples.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/volazobapuzirixolajone.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/24365647494.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/vesapojidus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/sinagasabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/2386490186.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/latorokodezukofunoloxubi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/67902615216.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/44377338760.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/alm_da_justia_agnes_heller.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b44.bin
cfcd9c9001e66127f789817e56bf78fb671ce8f9e0a26c403a3014ad17b8801d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 5296 bytes
font_01_sfnt_off00008d1b.bin
05b4846b4db8a00ba8985c606a438c2bb8c70aaaf4feea632f53b5d4c693e6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1B 21980 bytes
font_02_sfnt_off0000b95c.bin
4cce2d7f8088e760dc42768588e97f3634076b58361e2c24a87ceb2b0dc6c693		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB95C 11924 bytes

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