Malicious PDF — malware analysis report

Static analysis result for SHA-256 6062bcdb1506a9b2…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 05:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce58add1b6f86ee7b023b60759c87c1e SHA-1: c33fd071da64cd008eb5e025ee467d5788aa2bf5 SHA-256: 6062bcdb1506a9b2dcaf8a7fad6c1046efe7c4989d885ddb9222c9d0ceadb7ee
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+vehicle+emulator
    • http://zakepuju.ieselpicarral.com/uploads/1/3/0/9/130969140/relodadusudoro.pdf
    • http://files.michellematternyoga.com/uploads/1/3/1/3/131379402/9c4283d471b75da.pdf
    • http://files.healthtechhta.com/uploads/1/3/0/7/130740442/kosikulonubesitabo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/gemidek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/76241832821.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/samafasuzijaput.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/geveboroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/19080003227.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/zewisuzosogila.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/63009983925.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/vowuwutezitiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/91547899171.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_off00006e9a.bin
c11a5f00eb127ea9d48b2edec5b4120dd31a77fc0387fb87be37dfc6311000e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5052 bytes
font_01_sfnt_off00007f95.bin
61e96ff568110934ace30b907a37cc8fe4d00f43a7747dc4776707e9109ada00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F95 10652 bytes