Malicious PDF — malware analysis report

Static analysis result for SHA-256 31faec138a606ef7…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 12:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe0c88a1028ebc838daf5d6df770ebec SHA-1: 8d444be8cb7a2da285b08c29d5a7ebd91eb2a425 SHA-256: 31faec138a606ef7c7a0027b3db443c6d7307e2d9c11443d54a6e9002e12e561
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body text, though obfuscated, mentions 'Kindle like pdf reader android', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

Heuristics 3

  • 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.
  • 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=kindle+like+pdf+reader+android
    • http://tupusu.eaglehavenwinery.com/uploads/1/3/0/8/130874431/jojonipigof.pdf
    • http://files.sp-arms.com/uploads/1/3/0/7/130776073/1dae08f5004.pdf
    • http://files.kincardinecheetahs.ca/uploads/1/3/1/4/131413718/ronagimiko_ledoronamevodox_tisofasolimar.pdf
    • http://files.jjsalvator.com/uploads/1/3/0/7/130775098/6215905.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/waxunukebawowimovefan.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/govuxutulaguje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3097/files/dolarosologaxixizabuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/bb_gun_targets.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/linisufenojikok.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/73986010472.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/fikusexotejubipib.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/3294409563.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/83564416498.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/70518950989.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/tawigikejidatugejik.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_off00006603.bin
7b8ef42539a03ce4a4f3c3a44390e20127b4eb518698d01d6f7d8ef64739599f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 4888 bytes
font_01_sfnt_off000076af.bin
f1a609dfde93a4274c9c8b83307e9ea9a046710bc5d7d8ae34f4307c5b368727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AF 10284 bytes

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