Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfe90542e93d4e3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 23:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3286f52aaeb7b161344d4b397ea46bf9 SHA-1: 0e271b3b174fa0a2f208def8dbcdad037e1fa50e SHA-256: fcfe90542e93d4e3c35498ff901186201ab93e877b1e3bca1d2a23b89ffd6064
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=coca+cola+philippines+annual+report+2017`. The document body, though partially corrupted, contains text referencing 'Coca cola philippines annual report 2017' and the wkhtmltopdf application, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=coca+cola+philippines+annual+report+2017
    • http://zapedisi.kenzieparkerboutique.com/uploads/1/3/1/8/131871991/5069224.pdf
    • http://files.brmreps.com/uploads/1/3/1/3/131379256/6160567.pdf
    • http://files.hannieshouse.org/uploads/1/3/1/3/131380992/0b543a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/darifuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/10915378016.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/23723443194.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/62182669520.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/diablo_2_1._14d_maphack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/puwivafafiwigizinol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/fufisir.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/wewotijonukefigaka.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/41118177711.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/63042954965.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/fumubopuxupubumoridegovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6925/0463/files/kaufland_letk_ostrava.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_off000060ed.bin
64b80b8b4199e1c9db0d4fb37b0c09f543f7a591e1db335de7865363d372952f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 5332 bytes
font_01_sfnt_off00007303.bin
a61f26cf48b19b7962319bc6f672acd36eddb9b3b75d26e199abd9db1d507b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 10076 bytes
font_02_sfnt_off0000956e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x956E 4324 bytes

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