Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c986d3dcad7d31…

MALICIOUS

PDF

37.4 KB Created: 2020-08-23 20:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd8d71b3c251f8ff39c136ef04389da SHA-1: 97f9d04068c91b631754fa46e2e5cb82d97b632c SHA-256: 78c986d3dcad7d31a072ba01508609832dcb7768973ad17c1d84b2ae3cbf64f3
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of external links, many of which point to a redirector service. The document body contains garbled text and embedded URLs, including a suspicious link to 'ttraff.cc' which is known for malicious redirection. The presence of numerous links, including those hosted on Shopify, suggests an attempt to manipulate search engine results or to lure users to malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=sharepoint+calculated+field+date+format
    • http://files.jguerzonpictorials.com/uploads/1/3/2/7/132740423/pivara.pdf
    • http://files.hangmansdrop.com.au/uploads/1/3/2/7/132741709/tafexolemu-giwegemetu-vofomeki-lodanevofitejon.pdf
    • http://sifufepof.mahakaitreasures.com/uploads/1/3/1/3/131381241/vakozekurame_mukale_kafam_libuwasi.pdf
    • http://files.cocewl.org/uploads/1/3/0/8/130874526/cf3022.pdf
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/instrumen_akreditasi_puskesmas_2018.pdf
    • https://cdn.shopify.com/s/files/1/0461/4419/2675/files/borderlands_3_pc_performance_optimization.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/kolimiraf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/chief_keef_dont_like.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/bebuzukevugetewanulukap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/58042548253.pdf
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/tifalotevunilererexupire.pdf
    • https://cdn.shopify.com/s/files/1/0445/5694/3524/files/xewataginamedagupemu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2209/6283/files/toruro.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_off0000550e.bin
61d939bc13fa6b8d7126fb428cb974bb37addd8f7292944fb368a1c1776e836c
pdf-font-stream PDF embedded font (sfnt) at offset 0x550E 5320 bytes
font_01_sfnt_off000066f2.bin
a0ab77e9e83c6fc932aaa260d0a484b962b4cb5401bed6d0fdc1de2533fd64b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 9944 bytes