Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f882ea7e100e624…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 13:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0483111d2c5c8b0ab21790b0d74271e9 SHA-1: 9e59084fe1e0ae67059247c3438e8894efcaf6f3 SHA-256: 0f882ea7e100e6243c838af2dba71079c6709fba962a466969170914ebc0379d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/wix?keyword=flight+radar+24+apk+paid', suggests a lure for potentially malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a high likelihood of redirecting users to harmful content.

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/wix?keyword=flight+radar+24+apk+paid
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c3f88d_b546fbb4ea574eae8cc173aba76a6490.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8720849d8cc43cc9628223bf32455db.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b76a687defe4b8bb8b14de33fecf263.pdf
    • https://static.usrfiles.com/ugd/735424_6f34f76037dd42729a05425814c1eb61.pdf
    • https://static.usrfiles.com/ugd/66c878_92db65e15a9a45f0811666fd63883153.pdf
    • https://cdn.shopify.com/s/files/1/0434/9175/4149/files/70638746895.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/lujitudateru.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/82254250866.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/vezutakoborofimele.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/59267237408.pdf
    • https://static.usrfiles.com/ugd/1cfe37_0049b39d73b34e3c9b15cd7d56d7ac0c.pdf
    • https://static.usrfiles.com/ugd/5a1791_ec33b26624e24f5894c0592bc7f0fd66.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3d2e4acaca41d0aa66ff906e5fabe5.pdf
    • https://static.usrfiles.com/ugd/b8c837_93acebf79db545608ff8a3e82f9c4b1b.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/levejifunuvobitimademepid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/46958590618.pdf
    • https://cdn.shopify.com/s/files/1/0468/9890/5250/files/video_bts_dna_official_mv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e7.bin
edfde034f018d1fbb1464aae01fb2ebe5a6208707aed2452f48fdc586b6d05c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 5284 bytes
font_01_sfnt_off000079e2.bin
4dd200f12d0a3aeffd69839a486e8a1efa217064856dfd95d15f07c5916da8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 10392 bytes

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