Malicious PDF — malware analysis report

Static analysis result for SHA-256 501b9caebf5292ab…

MALICIOUS

PDF

53.8 KB Created: 2020-08-25 17:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b4a9492730af96f36733136dc2edf9 SHA-1: 5a1a553b8b9da77547c8cb5f2c447bf5a7f887fc SHA-256: 501b9caebf5292ab543ea86e2990d82a236123bb27bca37a307ba17f814a1f78
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The presence of a visual download button lure further supports the malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=arjun+reddy+audio+ringtones+free, which redirects to other content. The document body, though heavily corrupted, contains references to this URL and other PDF links.

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=arjun+reddy+audio+ringtones+free
    • http://gatenumaw.restoreyankton.com/uploads/1/3/1/6/131607163/6821512.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/33430373575.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/advanced_accounting_beams_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/5878159817.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/73646328079.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/76952181759.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/amilcar_cabral_political_thought.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/2005_jeep_liberty_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/clement_of_alexandria_paedagogus.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005824.bin
e816f2c564f2bbd11707961c6ae9cb19adfa71c373602b31321d8ba4ae07f816
pdf-font-stream PDF embedded font (sfnt) at offset 0x5824 6384 bytes
font_01_sfnt_off000067db.bin
d04da509ed7f38a409d58febb4ed42ff50d37266fb39271f78370409eeca7b99
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 5212 bytes
font_02_sfnt_off000079b0.bin
83920e22ae2e65137f760ee981e82865cf347a32518f873aefd932f8c8d07d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 3176 bytes
font_03_sfnt_off000086e7.bin
16e994e7527d1b9e6d62d7b4b4d3ef5c88fec493ed93c4695ccb1a7794895cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E7 4420 bytes
font_04_sfnt_off00009803.bin
d5f2928f272459a8d196ea44fe9aa536e7c0a0e5adbe4d976b034fe46c61a678
pdf-font-stream PDF embedded font (sfnt) at offset 0x9803 15440 bytes