Malicious PDF — malware analysis report

Static analysis result for SHA-256 932e017d2cf66e2b…

MALICIOUS

PDF

57.8 KB Created: 2020-08-30 05:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd9b674ceb1f62829818c7ba7ca94754 SHA-1: 46fee806d3f14cccc5b55da581c8955aa93f4314 SHA-256: 932e017d2cf66e2b461d95173880cabf83d41d01c5958324edee1db8ae8740cc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.me/wix?keyword=amazing+grace+my+chains+are+gone+lea'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign content on cdn.shopify.com. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify this as a malicious document likely used for phishing or malware delivery.

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.me/wix?keyword=amazing+grace+my+chains+are+gone+lea
    • https://static.usrfiles.com/ugd/e1d12c_f8c9ff76f2a64490b4f843bf0535390a.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f1828950c49308e396aa98137963a.pdf
    • https://static.usrfiles.com/ugd/e3ff21_4baa8ba0faf04b3aa8b9f13158002872.pdf
    • https://static.usrfiles.com/ugd/fd30ac_b12ac7a989e1401ab38565a228c56e36.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a10ce090e854ed3947ec2c181d10032.pdf
    • https://static.usrfiles.com/ugd/e4a001_0cf5859128f84d93a1bc17bb424a9a22.pdf
    • https://static.usrfiles.com/ugd/b8c837_436b470d7889460b89dc67d65f879388.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/12954851157.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/axial_flow_compressor_noise_studies.pdf
    • https://cdn.shopify.com/s/files/1/0439/7731/0366/files/sitavizisegojazu.pdf
    • https://cdn.shopify.com/s/files/1/0463/4909/0978/files/zogugoxuboxibikufus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/cellavision_dm9600_operator_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/34681254552.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/bitegepofalekukija.pdf
    • https://cdn.shopify.com/s/files/1/0464/7039/8110/files/2974979588.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/a_bazz_songs_mp3_download.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_off000077e5.bin
7d4000255955fe0bf65d2163dfe55bd873a04038f7108b6393ef0bdecadcc929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 13352 bytes
font_01_sfnt_off0000a348.bin
82054b268a8b1923c5eb4d52c39a4309b2b22b0b29185ec20f85460eeb6e815a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA348 5356 bytes
font_02_sfnt_off0000b550.bin
6473a67de2a63eca62280d873e24840b7901b845017ac1efe51e7373414842a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB550 10704 bytes

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