Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab313e4fda07a6c…

MALICIOUS

PDF

57.7 KB Created: 2020-08-01 20:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b7216145c8f928940ed9fe14942a26 SHA-1: 68002c2cd09e7375c678ebea712e2a053e052355 SHA-256: 6ab313e4fda07a6c2edd7dbe1b2657bae114281f95e0ce32360eae91e962fb3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including a primary malicious redirector URL, disguised as a resource for Minecraft texture packs. The heuristic firings indicate it's a malicious redirector and a link farm. The ML classifier strongly suggests maliciousness. The embedded URL points to a malicious redirector, likely intended to lead the user to a phishing or malware download site.

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=minecraft+xray+texture+pack
    • http://files.okcastle.com/uploads/1/3/1/4/131409098/fudegerav-dozemadixukovi.pdf
    • http://files.meredithcarro.com/uploads/1/3/2/7/132712358/jagemuzemusa.pdf
    • http://files.paperitbeautiful.com/uploads/1/3/0/9/130969985/096008955.pdf
    • http://files.laserquestbournemouth.co.uk/uploads/1/3/1/8/131857334/lifopurub_latatowisasujat_jobazepipaka.pdf
    • http://files.realfeelings.net/uploads/1/3/0/8/130873840/kovinidaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/lobafaxodubitero.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/pirokoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2254/0185/files/wexewojitepeboforixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/91947770428.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/30459025870.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/nizum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/tefoxalomidogovirofuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/2922174861.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5121/files/savaxanetes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/wawagemitekigetalasilubuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/podifoj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a369.bin
cb6f2618d44a7808d73cc602d5bcf1d0cd4935175f6f29a1b4e3ce72389dc13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA369 5040 bytes
font_01_sfnt_off0000b4c0.bin
5a6bd0b7b7126aaec1629d33ccc1fc8d3a13364a04823b5585e74daf0c84f9bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C0 10860 bytes

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