Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43f0c53d53337e5…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 06:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c5283f0c6675ade4929d9105ea44e71 SHA-1: 09e54155953133b3dae40295cc4fda8c4650820c SHA-256: e43f0c53d53337e58e2acf0fa2dd18a997068a003d24649037dbbcfb13a0dd1e
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to a sociology book and the wkhtmltopdf application, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination, which is likely malicious.

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=napier+press+sociology+book+2+pdf
    • http://files.dawnhorstead.com/uploads/1/3/1/1/131163533/1b8e45893f359.pdf
    • http://zibiti.athensprep.org/uploads/1/3/1/4/131406390/15b39db0682ab.pdf
    • http://files.pestboyz.com/uploads/1/3/1/4/131454634/wigovepukovusuj_laxufisike_povakun_kakinuraxixiv.pdf
    • http://files.thecentreofthecosmos.com/uploads/1/3/0/9/130969254/zuxotijuzesed_varalenero_ruvugozep.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/wipuxufepetakux.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/jugomalepusedaxebisax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/javakudoba.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/29440919149.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/answer_sheet_toeic.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/mechanics_of_materials_8th_edition_gere.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/32660718951.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/77027514703.pdf
    • https://cdn.shopify.com/s/files/1/0447/9716/5728/files/the_accidental_prime_minister_book_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/autism_spectrum_disorder_treatment.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_off00005497.bin
b40619c51c8d25552ec98bd9b9251e2c95b572b62b7b7fdd0f647eb07b5b97a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5497 5332 bytes
font_01_sfnt_off000066ce.bin
ef6177fff832a02c90016c65bfb4e8c014b64672b8b0446d9efc0abc1a594859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CE 14208 bytes
font_02_sfnt_off000093b8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B8 4324 bytes

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