Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aca34e70bc2e04d…

MALICIOUS

PDF

59.9 KB Created: 2020-08-10 12:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28590c6f6b7066ec825e4ef6cd65b7ba SHA-1: 2b36c70dddcd4a7ce19e74adff5c6bae903766b1 SHA-256: 2aca34e70bc2e04de3f9d0ffe81e9937d4c03bca6e3c8058d968b48f54a71ff2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is embedded within the document body, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The document's purpose appears to be directing users to this malicious infrastructure.

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=definicion+de+control+total+de+calidad+pdf
    • http://files.gardenclubofthemiddlepeninsula.com/uploads/1/3/0/7/130739525/jedigexu-disuwis-japixubadakuk.pdf
    • http://files.anantsudarshan.com/uploads/1/3/2/3/132303312/jiluvowite_kodop_baxapi_sazaruwum.pdf
    • http://files.butchwonders.com/uploads/1/3/2/7/132712127/vapurakiruxiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/1001_arabian_nights_in_bengali_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bay_leaf_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/57415267789.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/15146476392.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/rokadarakidox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/zenalupozalitip.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/33409066533.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/madegorumasosipun.pdf
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/fawopi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/dowojenatabikanerusar.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_off00009f33.bin
0770c09cae282bfde21100e648941faf99a0352a00ff8b705b562929108085a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F33 4756 bytes
font_01_sfnt_off0000af63.bin
b400a44be9c738e20ecc0e35d3cdbbbb243c9f7c5bf18226c89b88f8009ffe85
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF63 11384 bytes
font_02_sfnt_off0000d457.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 4324 bytes