Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7a7e00f48d72f1…

MALICIOUS

PDF

48.1 KB Created: 2020-08-03 07:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 342b8d2d7749f5c715bdf1fde0beac2b SHA-1: ee71ae7c5e443422aa694e158dc94b0fb09a072b SHA-256: 2d7a7e00f48d72f1d30a77fa7d3099c0842e7cfc40da24e80da710e005ff4f35
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'https://ttraff.cc/pify?keyword=pennies+to+dollars+converter'. This suggests the document is designed to lure users to a malicious site. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains references to the converter and the redirector URL, reinforcing the attack pattern.

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=pennies+to+dollars+converter
    • http://files.inspirationstudiosgallery.com/uploads/1/3/0/8/130813511/3251999.pdf
    • http://files.williamsomerville.com/uploads/1/3/1/4/131437475/zopefawotopexow.pdf
    • http://files.miniaturedalmatians.com/uploads/1/3/1/4/131407571/b9d3d95d83.pdf
    • http://files.michaelredondo.com/uploads/1/3/1/0/131070938/1949215.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/shawn_wasabi_soundcloud.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/94905373792.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/surovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/tijen.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/46263117682.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/94513203655.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7539/files/xezezerokeval.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/bugotopepanirovekesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/95997552797.pdf
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/14851769496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.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_off000071b3.bin
1329ca77c75b1529c84359d5e8ee37b9f3ca046bcf4914be20669e4d5bbbeea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 4780 bytes
font_01_sfnt_off000081f7.bin
b929c0e90f856938ac10530b6f000d03544d7dd78b4782fb20e25f3cb07a322c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 10424 bytes
font_02_sfnt_off0000a58f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58F 4324 bytes

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