Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec619a5fac22e0b…

MALICIOUS

PDF

53.2 KB Created: 2020-08-01 13:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65fe2cb7b19bad6f056fe46792d14ba8 SHA-1: a39ccfec69f5c94b9ccaff1e942bd6c6b4988778 SHA-256: aec619a5fac22e0b8a159e7ec6f026be655da33286a2dade34028c596a8c28a0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which are hosted on Shopify, but one critical link points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a lure to download or view content. The presence of a visual download button heuristic further supports this phishing-like lure. The primary malicious IOC is the 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.cc/pify?keyword=minecraft+1.+8+adventure+maps
    • http://files.timelessvoicesohio.com/uploads/1/3/2/6/132695629/8152101.pdf
    • http://files.cjonespr.com/uploads/1/3/1/4/131437832/wojugedot_gafog_tazozosa_vimodovijovade.pdf
    • http://files.derekdturner.com/uploads/1/3/2/8/132815791/jifubalamilopen_tidojifuzor_nimixuduwideb_rerumijo.pdf
    • http://files.kishakcollection.com/uploads/1/3/0/7/130738524/4825242.pdf
    • http://files.theedge805.com/uploads/1/3/0/7/130740069/f58324d1dd01ae6.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/tajerapobafujilakeze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/kebuxuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuwuvovevikusezavufada.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/97848650824.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/xenupitapedinabanakega.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/zugejabatubimujajusawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/32495049697.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/lujilefavokiwav.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/roxuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/2904280080.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/28705332888.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/99191508651.pdf
    • https://cdn.shopify.com/s/files/1/0428/8928/1692/files/70373330528.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_off000084b7.bin
badb1be472f1d751af325aac8d961f4e1e477ce66a60f962ed7b836de694561b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 5384 bytes
font_01_sfnt_off000096f7.bin
2d0791f8a6632044e2c0c3c2499157ec1d659c6341b8144bb17112d71433d831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F7 10172 bytes
font_02_sfnt_off0000b9cc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CC 4324 bytes

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