Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ec39fa02c04660…

MALICIOUS

PDF

76.7 KB Created: 2020-08-20 07:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83a7f857854b76b66c71c606499da62d SHA-1: cc1d7293af96c72b5a0c5aedb704d3f3cc395db1 SHA-256: 79ec39fa02c0466083b934f554cd03981dc35fd96b5470047430895697731152
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'God of War PS4' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous PDF links and a malicious redirector suggests an attempt to drive users to potentially harmful content.

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=god+of+war+ps4+guide+walkthrough
    • http://nuraj.makethisout.com/uploads/1/3/1/0/131071220/lojixuso.pdf
    • http://files.menomoniesaddleclub.org/uploads/1/3/2/7/132712174/6f3552156cd01.pdf
    • http://files.merrifieldseminar.com/uploads/1/3/2/7/132710655/7749287.pdf
    • http://files.shsoh.com/uploads/1/3/1/4/131406744/mujupirawoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/28834005932.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/60486205812.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/5778975147.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/piano_music_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/16260341139.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/bbwc_fan_forum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/lipisixipivaloga.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/didavuzanozaletoxabijirip.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/nofonetam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/54441128005.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/fidubavibevofoxizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/antigen_antibody_reaction_types.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef28.bin
3010b597c5519114f57db3304537ad88cf2432918b347a3698580e1e5c47acbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 5580 bytes
font_01_sfnt_off0001023c.bin
63d954a4bca8fbf4ee5aa29228b9146a71b37408d8109d593ff040624bbe7403
pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 10316 bytes