Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d2f04cb1351eb9…

MALICIOUS

PDF

73.6 KB Created: 2020-08-04 21:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc8371c231b33becfcdaf62d4bb9d55 SHA-1: 59137e45101f77e39fb994468840b50ff0c75545 SHA-256: 93d2f04cb1351eb97f5000056f0377c19a430c4de9139f1d230112fc79f72f5d
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The embedded URL points to 'https://ttraff.com/pify?keyword=triple+integrals+in+spherical+coordinates+pdf', which is likely intended to trick users into downloading further malicious content or visiting a compromised site. The ML classifier also strongly indicated maliciousness.

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=triple+integrals+in+spherical+coordinates+pdf
    • http://files.doubleadobeschool.org/uploads/1/3/2/7/132740541/gaxiburawominififik.pdf
    • http://files.pittdanceensemble.com/uploads/1/3/1/6/131606046/241152.pdf
    • http://files.atraintheplay.com/uploads/1/3/0/7/130740517/6b2e9aee.pdf
    • http://files.beingaum.com/uploads/1/3/1/3/131380354/1434646.pdf
    • http://files.rollinghillsfarmandequinellc.com/uploads/1/3/1/8/131856743/4769957.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/supef.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/csgo_mouse_wheel_jump.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/while_loop_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/lejojifom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/zofazevufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/58924271845.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/jumaduvolulibagonizivago.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/nuviwuzetegogunabavonobip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/51999497286.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/xupazelofodidunevevug.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_off0000c787.bin
f5d8a7e7d86e2d3d339a7605a32b258727d2d32ff4b465b2b1cf26b6b9005ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC787 5156 bytes
font_01_sfnt_off0000d8f6.bin
518c4822940f89ed04a48c2c6e6e7455b22c5fd3e77a8c9c2a94a6060bea31bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 16024 bytes
font_02_sfnt_off00010aa8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 4324 bytes

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