Malicious PDF — malware analysis report

Static analysis result for SHA-256 b656587723758755…

MALICIOUS

PDF

44.9 KB Created: 2020-08-01 23:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f5c865e45bc9f6f1dce5f1258262117 SHA-1: 794826977dc1e9920d62950d3b53e5ed7b55d858 SHA-256: b6565877237587554c39dbe934ac1a08ff24061e2928e1165c9e04db4e253dd5
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the text 'Icy veins rogue leveling' and the malicious URL, suggesting a lure to a malicious site. The presence of numerous other PDF links, as noted by 'PDF_SEO_LINK_FARM', indicates a potential link farm or content stuffing technique to obscure the primary malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=icy+veins+rogue+leveling
    • http://files.tylermoorefilms.com/uploads/1/3/1/4/131406173/2a4b03996.pdf
    • http://files.occok.org/uploads/1/3/0/8/130874296/bevivikojase.pdf
    • http://files.iaphilosophicalanthropology.org/uploads/1/3/0/9/130969801/lavatowito-kojara.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/37277884348.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/56344992754.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/4311153268.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/5113741464.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/18538180480.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/wikomaxupisazunerasapudet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/kusuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/nirosaza.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3677/files/1586019498.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/femifagojuzaberosupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/xowimojasusoleferop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/46473763307.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_off000073a8.bin
7ea8908953ab9e35133dc9a10c5e7c0facd2023cb20da2c7fd1f25eea1adaf48
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 4856 bytes
font_01_sfnt_off00008452.bin
5959bdbfdca97defd01d10dad2979534e01249c254aa008d6c33dfae0b021fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8452 10196 bytes