Malicious PDF — malware analysis report

Static analysis result for SHA-256 d499cbc9e6f6223d…

MALICIOUS

PDF

56.5 KB Created: 2020-08-08 04:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199bac01e2e15ce316210be05d0d05da SHA-1: 2a0fc4c9ce1e75146ebd5af12e80cd704cc7f5a5 SHA-256: d499cbc9e6f6223da1c4d3eb9b0447cc8ec6eb75bac6ed14647846d688012732
128 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. Another critical heuristic indicates a link farm, suggesting SEO manipulation to attract victims. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary IOC is the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=algebraic+identities+class+8+worksheets+pdf
    • http://bifubigo.simplyinspiringimages.com/uploads/1/3/1/4/131408027/bafevalibujod_murisupalis_lapogumobife.pdf
    • http://files.christmaslunches.co.uk/uploads/1/3/1/3/131398259/a46b34c10d44451.pdf
    • http://files.garymkaye.com/uploads/1/3/2/6/132682929/zosoburobe.pdf
    • http://files.currantcreekoutfitters.net/uploads/1/3/2/6/132681836/wapogesunidikum.pdf
    • http://files.inkycycling.com/uploads/1/3/1/4/131483009/mumakowixolif-dupoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/19519151956.pdf
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/kevidarek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/2562196286.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/ribokaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/48936591991.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/36366255426.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/probability_measure.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/47828473233.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f62.bin
42171948ef5c4197fc8431fd7d91aba67836da239bff52fca63dd7451f2e0f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F62 5684 bytes
font_01_sfnt_off000082b9.bin
7e7f97c5ccc164605dd7482fc4f97b32874216967cb2bcab9c2571295e2ab3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B9 14864 bytes
font_02_sfnt_off0000b0e7.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E7 16204 bytes
font_03_sfnt_off0000c617.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC617 4324 bytes

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