Malicious PDF — malware analysis report

Static analysis result for SHA-256 4317bbf4b9926184…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 01:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe9cda88593ff4e649a44cdef50ff597 SHA-1: 9d22828b85c30671a7412494e5e3fe2e6c5a5220 SHA-256: 4317bbf4b9926184050d0644bcbff38c8f97053a54be66bbb2cc53d3105ca97e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL and references to other PDF files, suggesting a coordinated effort to distribute malicious content or phish users. No scripts were extracted from this sample.

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=describing+words+for+school+reports
    • http://files.prestonsweeps.co.uk/uploads/1/3/0/7/130776640/kavubuzulitom_bububutut_jisim_busabave.pdf
    • http://files.meowmeowpowpowlit.com/uploads/1/3/1/4/131483143/3849451.pdf
    • http://files.hilburnart.com/uploads/1/3/1/8/131856725/vitojeki.pdf
    • http://pogefow.aspireinsurancegroup.com/uploads/1/3/0/7/130776131/bokuxake-detubuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/15946414897.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/jerewet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/carol_of_the_bells_flute.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3127/files/xarfaha_af_soomaaliga.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/annamayya_songs_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/report_on_historical_place_taj_mahal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8247/files/gsheets_python_api.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/xekute.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/nebexaxumuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/performance_evaluation_of_bridgeless_pfc_boost_rectifiers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/1650366979.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/47803914597.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_off00006af4.bin
c4531b10007946334428920b8a5bf7d6de78a1d4b880816ceca025ef072b243d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 5224 bytes
font_01_sfnt_off00007cb6.bin
81d9807e1105abf18726cc3c259269de4f0c743e47a42daa1b4426b2e3cb9ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 9772 bytes
font_02_sfnt_off00009dd4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 4324 bytes