Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f72f50f0289de1…

MALICIOUS

PDF

44.0 KB Created: 2020-08-04 22:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a76d7984c0c84f3954c8bf163a5fa51 SHA-1: 2cb10ba8e2071d7edbb766b36a313ff8bd61546d SHA-256: 46f72f50f0289de1aa9112e8595023251302f87c01e8c8a520a5168d3528618c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to a link farm hosted on Shopify, and one critical link to a known malicious redirector at `ttraff.com`. The heuristic firings indicate this is a malicious redirector and a link farm designed to distribute content. The ML classifier strongly supports the malicious nature of this PDF. The primary attack pattern involves luring the user to click on the malicious link, which likely leads to a phishing page or malware download.

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.com/pify?keyword=academic+english+pdf
    • http://files.toblergymnastics.com/uploads/1/3/2/6/132681342/2062445.pdf
    • http://files.billyreynolds.com/uploads/1/3/1/8/131871907/dedujip.pdf
    • http://legula.ruffrelations.com/uploads/1/3/0/8/130813054/8222398.pdf
    • http://files.expressionsdanceplymouth.com/uploads/1/3/1/4/131482941/070fe87491.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/71978749406.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/9952815934.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/human_ecology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/deramoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/nukotusatuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/zuwuvidawanukatupim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/73974050663.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/99538540755.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/55672109537.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/47302367187.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/tinkers_construct_modifiers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/xajukexaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/majajuxizewaris.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_off00006117.bin
e18137d57c5398ed5be6eb827df2ca44939009d3061ba5c60ebb263929de9ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 5060 bytes
font_01_sfnt_off00007214.bin
8a81a2001af98816bcd42fe2d96b6379a0e0a601f32924e56dbe0f73a198469f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 10272 bytes
font_02_sfnt_off0000952b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.