Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b22b4bda9466ef…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 17:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbcfb02d23337a32f302607b07a26cf4 SHA-1: 2ef507e44a97cde52dbfe45036050da6eec2bf6c SHA-256: c6b22b4bda9466efdac4cf06e7c70610f5a60f79aeb59f1a12eabd4ac2ef6bf6
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which lead to a redirector service. This technique is commonly used to obscure malicious destinations, such as phishing sites or malware downloaders. The presence of numerous links, including those pointing to the ttraff.com redirector, suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=terraria+pickaxe+guide
    • http://puvomaw.certainlyarmstrong.com/uploads/1/3/1/0/131070767/tomudari.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.danssmallenginerepair.net/uploads/1/3/2/8/132815181/5037645.pdf
    • http://files.coldironarts.com/uploads/1/3/1/3/131384635/bobodalulopez.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/78947103202.pdf
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/64762246384.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/english_book_for_beginners_adults.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/sesuxofatabeziripewel.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/pdf_babylon_mystery_religion.pdf
    • https://cdn.shopify.com/s/files/1/0436/1427/3693/files/animal_sounds_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/723427013.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/68908818088.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_off0000605f.bin
890cf1cb0dcfe3dd32c18b75c571e22cccde34419d643b41758c69d616271c2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 5112 bytes
font_01_sfnt_off000071d7.bin
95660f77b941b0036fc7d8d372d45ae6c42fc20ab2dd76a0179ec19577aa661e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D7 10940 bytes