Malicious PDF — malware analysis report

Static analysis result for SHA-256 3801a54addf7e6e1…

MALICIOUS

PDF

36.4 KB Created: 2020-08-18 16:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3708b784531273e33976e8f9ec778579 SHA-1: fa538857424d8b2f119d82061e0ac8c457a3fdfc SHA-256: 3801a54addf7e6e1e61a598318e70ade4a8564688c36ebb783eb01a55bd61620
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 firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=carpenters+sing+sheet+music+pdf'. This suggests the document is designed to redirect users to malicious sites. The presence of many Shopify-hosted PDF links, while individually benign, contributes to a link farm pattern, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, but the overall pattern points to a phishing or malware distribution lure.

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.ru/pify?keyword=carpenters+sing+sheet+music+pdf
    • http://viliduxa.sheilajnorris.com/uploads/1/3/0/7/130775475/cc1d784a89.pdf
    • http://files.dawndiezwillis.com/uploads/1/3/2/6/132695862/tazuda_wetonibojiw.pdf
    • http://files.shipasapfreight.com/uploads/1/3/2/6/132682833/1876bc94.pdf
    • http://files.glynnpt.com/uploads/1/3/0/7/130739621/2612858.pdf
    • https://cdn.shopify.com/s/files/1/0430/1307/9203/files/58448030583.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/59104975412.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/sisup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/fabadurosenux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/37588662235.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/47150257308.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/general_organic_and_biological_chemistry_timberlake.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/toludosujirefepafavof.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/mowovikilakatalewijugekas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/fonadimidibisezojalatajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/24929620581.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/editorial_writing_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/65251997997.pdf
    • https://cdn.shopify.com/s/files/1/0439/2674/9339/files/newesowagagabizepofelatun.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_off00004ecc.bin
7f09666f0e8d91baf0680a44d1ea7b407500d96645f99b5b3aedbf8e4573eab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECC 5440 bytes
font_01_sfnt_off00006120.bin
af77943fdf779978dd213ec2230ffdd1c5e2c846e3e7840708694efb7f55d3b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 10436 bytes

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