Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59097d53196929e…

MALICIOUS

PDF

36.6 KB Created: 2020-08-25 05:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010f3b525a70b9abc8c56b9c7a79eefb SHA-1: 7ea9dce630531ef685937465312a604589fb2682 SHA-256: f59097d53196929ec02f9780d8feb6b5af0608dbde88adaeb62892f2214c1b13
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though partially corrupted, contains the same lure text and URLs found in the heuristics, indicating a deliberate attempt to drive traffic to these sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=breves+de+comptoir+pdf+gratuit
    • http://pezenoj.homespundelights.net/uploads/1/3/1/0/131070867/4306811.pdf
    • http://rewune.helpfulmeditation.com/uploads/1/3/0/8/130814229/8145fde8b.pdf
    • http://files.diedrabenoit.com/uploads/1/3/0/7/130739343/09e497e232d.pdf
    • http://files.porterridgeband.org/uploads/1/3/1/4/131438667/7e456b0.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/zamopiximebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/98626979613.pdf
    • https://cdn.shopify.com/s/files/1/0439/3461/3659/files/diagonalization_of_symmetric_matrices.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/pelafosemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/zovurujesolosekipot.pdf
    • https://cdn.shopify.com/s/files/1/0462/4849/3205/files/jorobovezemaraje.pdf
    • https://cdn.shopify.com/s/files/1/0462/9345/0913/files/tuviwufikinomereg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/oxford_english_for_cambridge_primary_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/declaration_of_assets_and_liabilities_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0841/7192/files/tesis_sobre_acoso_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/architects_scale_of_minimum_fees_rules_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/16165731514.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_off000049bf.bin
9508df9d6ae4463c5b27ccc225aeb42cc5bff66d36dc4785ac83f0cf722073cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BF 5552 bytes
font_01_sfnt_off00005c96.bin
5a3309cfdca77e3dafc72b790bd2117b6e418c809e418bfa1cec9d983ee39fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C96 12996 bytes

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