Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc3202718352237…

MALICIOUS

PDF

48.0 KB Created: 2020-07-29 19:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dd64659a784765b9d7479526fa1e46c SHA-1: 9601da0f9c6d43519292f2ba704a4c5cacc4e51c SHA-256: efc3202718352237880afe5ae6aabe3e96b234a474d138f3324bf7e0933ed79d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.cc/pify?keyword=cbse+date+sheet+2020+class+12+pdf+download`. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external resources, including `https://cdn.shopify.com/s/files/1/0435/4077/5064/files/53759570152.pdf`. The document body, though heavily obfuscated, contains text related to 'Cbse date sheet 2020 class 12 pdf download', indicating a lure for educational documents. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=cbse+date+sheet+2020+class+12+pdf+download
    • http://files.arbredeviecanada.com/uploads/1/3/1/3/131383750/1975890.pdf
    • http://files.ismaakarate.co.uk/uploads/1/3/0/7/130740175/ronupaf.pdf
    • http://files.nikigrewal.com/uploads/1/3/2/7/132740413/9626738.pdf
    • http://files.bullnettleridge.com/uploads/1/3/0/8/130815017/63c32b1d5.pdf
    • http://files.nikigrewal.co
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/53759570152.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/lipakanuxife.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/49117384003.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/47313278768.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/saxapixotetalot.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/tudebokigexugifeberafefew.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/52186315605.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/90733178195.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/20167423737.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/gugib.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/tukijovolexidabenaguxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/noxofenidumodove.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_off00007206.bin
b0719ddaf2cc4bbcb6b1e641ed466268bdaf6632f38d46909ad2995f5a8a414c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 5468 bytes
font_01_sfnt_off000084b2.bin
5171fa5037fac7ebe1e61b021daa34138716032c1fb7b69296b7915d345b8dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 14748 bytes

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