Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59a0c0fca4fdf47…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 09:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0869b9d802c9b0b281dc87cfc97d3c3a SHA-1: 965890bf8ac07f050b2cc866b598bfc9fe5e2b42 SHA-256: e59a0c0fca4fdf47d287cf79a0d13b0dc3ca331175d15132d59749aca8bf1d40
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with keywords related to Facebook Messenger video calls. This suggests a phishing or social engineering lure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely an attempt to manipulate search engine results for SEO poisoning. The ML classifier 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/pify?keyword=facebook+messenger+video+call+not+working+android
    • http://xanedaliw.csemedia.boston/uploads/1/3/1/0/131070786/refitijuzuwev_gowelu_pibikox_putesukesedal.pdf
    • http://files.childrensbenefitconcert.org/uploads/1/3/2/7/132740580/57d4023.pdf
    • http://files.yukonriverdesigns.com/uploads/1/3/0/8/130813818/089609dbe3b938.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/characteristics_of_romantic_period.pdf
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/ashrae_62._1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7887/files/cutting_edge_upper_intermediate_teacher_s_resource_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7150/4537/files/kumomedizovidivatebeminuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1930/5113/files/toluzoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/wagozudibujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/vevasatoginosijam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/compress_file_size_online_free_to_100kb.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/57828718706.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_off0000602a.bin
3677f60c84ec92ec0c4e59cfac5c34f4cd0b8d35c86f93b620713001457b7cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x602A 5572 bytes
font_01_sfnt_off0000730d.bin
34962b3a96a2cc5887b505069c680c38aef1d5d0e207bbaff852b4a5493ad96e
pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 10040 bytes