Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c6dcc60a8678d1…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 22:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6db0cd2f596f745be9e9aae4b0a49a SHA-1: 5b432dca9379898e996bee7108cac447a39b3d67 SHA-256: d3c6dcc60a8678d141cd448a936a2195a024adc9a2d4d867e0afb305877d8310
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.ru/wix?keyword=pairon+mein+bandhan+hai+full+song+mp', which is flagged as malicious. Additionally, a large number of links to Shopify-hosted PDF files were found, indicating a potential link farm or SEO manipulation tactic. The ML classifier also 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.ru/wix?keyword=pairon+mein+bandhan+hai+full+song+mp
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/zumul.pdf
    • https://cdn.shopify.com/s/files/1/0433/7146/2814/files/banana_fish_op_full.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/application_for_cancellation_of_bailable_warrant_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/pasataro.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/nozesikerozegur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/sufanikoremuduzexizorolom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/wunuwekozobogosomizava.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8de0b5250514b5fb7de2c281ec5ba82.pdf
    • https://static.usrfiles.com/ugd/b8c837_e02019584a954817afa1533844b0729b.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/46866418721.pdf
    • https://cdn.shopify.com/s/files/1/0437/1768/9498/files/qualitative_risk_analysis_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2840/4632/files/cardiac_anesthesia_book.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_off00004eef.bin
a42288f087306c374237fd7ebd7dd01f123d3ad11c8ae5c2251dc67d784a2eb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEF 5596 bytes
font_01_sfnt_off000061be.bin
cc4befe140efbe6d40def35401c7bab3ffb1c735f974d154b60c11231cfff975
pdf-font-stream PDF embedded font (sfnt) at offset 0x61BE 14228 bytes