Malicious PDF — malware analysis report

Static analysis result for SHA-256 94585bb5fda74962…

MALICIOUS

PDF

41.0 KB Created: 2020-09-09 01:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 823bc61b028e232fddc872e2ebdbb3dc SHA-1: ef33bcb72bf0cb795307aa8f0bc8669937e799d2 SHA-256: 94585bb5fda74962bddcc936375e1f772fdd48353ca60ef0014e49253ba32419
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including one to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Army tank games' and the malicious URL 'https://ttraff.link/pify?keyword=army+tank+games', suggesting a lure to a malicious site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of malicious redirector infrastructure. The heuristic 'SE_DOWNLOAD_BUTTON' indicates a potential social engineering tactic to trick users into clicking the link.

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.link/pify?keyword=army+tank+games
    • https://static.usrfiles.com/ugd/2e4eb4_9f20f9e5b6ab4c4995bc7c04b487f0a2.pdf
    • https://static.usrfiles.com/ugd/2813e2_d4ef2ef25f4f451ebf563d6cb30e388c.pdf
    • https://static.usrfiles.com/ugd/e4a001_751a68e0b4fe4150a4de8c9c1426e71e.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/25945463116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/99733241435.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/catalogo_redutores_cestari.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/9450236735.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/bosudororiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nelafujadodejofit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/sovikelipolajusudobuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/topol_cardiology_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0461/0628/0099/files/histology_epithelial_tissue_quiz_answers.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_off00006257.bin
99a96d52b27028160549f4fb338a3e8efa1512404d4a40065f140dae074cccde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6257 5128 bytes
font_01_sfnt_off000073c0.bin
d01d0c5d56fccf29d99adac3bf0814cd3cae811236bae556679cea0480829c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 10544 bytes

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