Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c704fb97bbd36b…

MALICIOUS

PDF

48.7 KB Created: 2020-08-01 01:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f9ebaa0f580a52bc9e9a28ebed1f7c8 SHA-1: c3ad251c175285ff268a2db0797c25e2ea6d63e0 SHA-256: 01c704fb97bbd36b7e24342632017314094212f587577fcec7112328d0507c58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to appear as legitimate PDF documents. The primary malicious link, https://ttraff.com/pify?keyword=linux+commands+cheat+sheet+2017+pdf, is identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains references to the Linux commands cheat sheet lure and the malicious URL, suggesting a social engineering attempt to drive traffic to the redirector.

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=linux+commands+cheat+sheet+2017+pdf
    • http://files.nationalhorselovers.com/uploads/1/3/0/7/130776682/0d9b220.pdf
    • http://files.authorshirts.com/uploads/1/3/1/3/131378852/gasumepotuju.pdf
    • http://files.indigobodymassage.com/uploads/1/3/1/3/131398099/5b8b57e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/90322190329.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/itextsharp_c_getting_the_comment_from.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6789/files/25970714260.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/60974081167.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/23493728669.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/87480639786.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/4699599230.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/22242061583.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/77280630613.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/13585706850.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/53493235409.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/lubiribokoviwoturebakuli.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_off00007452.bin
86e0631c5f18ccc220b2882fa44399ee1a8f3aabebecd3fbfa5a72fbcb557294
pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 5680 bytes
font_01_sfnt_off00008798.bin
1a82e28307071fab8e4776e35c4163acca39730e8d7299bf75f383101dd841cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 14596 bytes