Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1852d85e3a5c0de…

MALICIOUS

PDF

41.9 KB Created: 2020-08-14 16:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd51123b0147b81a4e137bbe5c19a1be SHA-1: c202f7c43c37066e3b0762c7a4230966ca6a9de5 SHA-256: c1852d85e3a5c0de49c9ef7246fe9fff929f8e7501778742dcec09a5fcd25b71
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=call+location+app+for+android+free', suggesting a lure to download or interact with malicious content. The presence of numerous PDF links points to a link farm strategy, likely for SEO poisoning or distributing further malicious payloads.

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=call+location+app+for+android+free
    • http://files.emilyreynoldsart.com/uploads/1/3/1/6/131606890/nixodaku-soxitufedavijo-sukuwaruriruj-kusixarade.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/93161087727.pdf
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/bash_rename_directory.pdf
    • https://cdn.shopify.com/s/files/1/0449/5812/2139/files/zolifapovoxiwer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/lepitojufutizoturubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/24023183602.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/funotixelevewavojebojaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/73284038197.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/94124232676.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/46252339896.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_off000059ef.bin
f0af947c8947f55bd4e7756fefacd602c60fda07c6efc5c200aa6e76372cff61
pdf-font-stream PDF embedded font (sfnt) at offset 0x59EF 4780 bytes
font_01_sfnt_off00006a38.bin
e094cb287ab76360dead39ae2805922e0aea1e4c399bad8d3ab3514730de5d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 10124 bytes
font_02_sfnt_off00008cd0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 4324 bytes