Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d7d54034ba5355…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 10:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21763e93b54ac3d995e9a3b5ef15e8a8 SHA-1: 44995efe6ce31ac051c4b5a55dc73a28530fdabf SHA-256: 89d7d54034ba5355064e021ad80eeb6288f849691a99cae3c17a0928af94c59f
154 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, pointing to 'https://ttraff.cc/pify?keyword=arjun+the+warrior+prince+1080p'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to obscure the malicious redirector. No scripts were extracted, but the malicious URL is sufficient evidence for the attack pattern.

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=arjun+the+warrior+prince+1080p
    • http://files.jacobraywagner.com/uploads/1/3/1/3/131383456/18c9c49ad79.pdf
    • http://nenemuvut.sonjahermann.org/uploads/1/3/1/4/131410952/zunisobawotiju_zizofeferubuk_mosubumigilux_teravoduvopi.pdf
    • http://divosedik.intrinsictheatrecompany.com/uploads/1/3/0/7/130775850/kujirefoto.pdf
    • http://files.eastsuperiorcc.com/uploads/1/3/1/0/131070009/buwugedurutusi.pdf
    • http://jemajuzu.martinhartfilms.com/uploads/1/3/1/6/131606490/8436683.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/acta_constitutiva_de_una_empresa_s._a.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/13589286567.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/36984137818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/bsp_fittings_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/rigid_portable_vacuum.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/sedumumosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/33909662912.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/23379277752.pdf
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/seekers_book_3.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_off000063c7.bin
d866666815a2f8e91fcaa81c594c3c9d852cc8a7b5126f2ba16e978d2b0d729c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 5356 bytes
font_01_sfnt_off0000760a.bin
d853349ad66a0fb59738d2e2f1f4f0f9b938bfa46bd86bd050d804d0868a39be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 10472 bytes
font_02_sfnt_off000099e6.bin
ee8afa51e50492bdf4d25b6b01818d2021856a0eb5271b70f188e6d094f25891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E6 2832 bytes

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