Malicious PDF — malware analysis report

Static analysis result for SHA-256 875df832363bda6a…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 08:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a0675e9165bfd09eb2e5b0ded2be253 SHA-1: 4024123f3f508bda574ddb5a528df008838c993b SHA-256: 875df832363bda6a61bc25087400f5bdf6745cd2373a87dc8bde0349e98c6cd7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector. The primary redirector URL is https://ttraff.cc/pify?keyword=endometritis+aguda+y+cronica+pdf, which likely leads to a malicious payload. The document body itself is largely unreadable binary data, but the presence of the redirector and link farm strongly suggests a phishing or malware distribution attempt.

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=endometritis+aguda+y+cronica+pdf
    • http://files.innerrhythmsmusic.com/uploads/1/3/1/3/131381675/vafemabilor-fukevaf-manuve-lemakuk.pdf
    • http://files.heartlandpools.com/uploads/1/3/2/7/132740580/bobutomozi_xupupiluk.pdf
    • http://pefod.romeprivatetransfers.com/uploads/1/3/0/7/130775934/9184576.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/rukubudutis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/widanumasadoluxadufuronaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/50411589642.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/search_engine_marketing_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/bursary_motivation_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/lawaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/14986450294.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/xiwomujovuvosuwaxowatavof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6901/files/48230452355.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/project_diva_pc_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/biology_brooker_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/pirusim.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/nvidia_driver_not_installing.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_off00006640.bin
6b2326851b7535d308c75f3c12731ec5de8446f99ff88639f06bf01aecc3b2d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 5504 bytes
font_01_sfnt_off000078ef.bin
ec131e589d96c5a828d94cbc1bd17aed618ece8ea208d6ffffc0fed601b019df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 11364 bytes

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