Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d453349ca84a9ba…

MALICIOUS

PDF

32.9 KB Created: 2020-08-01 15:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed08901925cfd7431e797cfbbefa7bae SHA-1: c0617395c439557b5892f721e42073566e58d017 SHA-256: 2d453349ca84a9ba252ac85460b536640108806d76e39cf74e249cded52a88cf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=casio+hr-+100tm+manual'. This indicates the document is designed to lure users to a potentially harmful site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content through a large number of seemingly benign links. The ML classifier also strongly flagged this PDF as malicious.

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=casio+hr-+100tm+manual
    • http://files.caitlinmylestherapy.com/uploads/1/3/1/4/131483097/pigiwopexurotop.pdf
    • http://files.gabrielledeveaux.com/uploads/1/3/2/7/132740399/dasegewerugebi.pdf
    • http://files.tonystledger.com/uploads/1/3/1/3/131398380/fubupibev.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/44802699885.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/57657436884.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/miresalobolofakarekij.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/90814904320.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/75584650816.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/72921192202.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/dimadanexafebilifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/78376976244.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64630415929.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/86656709652.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/fudolubipinoxigerugazosiz.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_off0000459b.bin
8f461de757bedd3386353cfa8f25609d196f62dbd07ef7ea531a1fec6387137a
pdf-font-stream PDF embedded font (sfnt) at offset 0x459B 5056 bytes
font_01_sfnt_off0000569e.bin
b8762c27802a7d0365c5d7f6bba797c59a0a8092435dc5b71ddd1df500fcfc19
pdf-font-stream PDF embedded font (sfnt) at offset 0x569E 9536 bytes