Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b02faac6c9f777…

MALICIOUS

PDF

58.3 KB Created: 2020-08-24 18:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2278f3ed35d4e4c30bf4ab522eda36df SHA-1: db2449bc4960b09908a63cfb62e6359c0689b637 SHA-256: 12b02faac6c9f777d2eed5973d321d2006d26bfc7a5206d89ce228ccf134eeef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to link farms hosted on Shopify. One prominent URL, 'https://ttraff.ru/pify?keyword=delhi+akshardham+photo', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly indicated maliciousness.

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=delhi+akshardham+photo
    • http://sagerigil.globalstakesconsulting.com/uploads/1/3/1/4/131407315/9810325.pdf
    • http://files.goodstuffprimaryresources.com/uploads/1/3/2/6/132681204/lamumolop.pdf
    • http://betivug.robinsonsisland-rles.com/uploads/1/3/1/4/131408899/ximetokaxufaxu-jozaku-zerikatem.pdf
    • http://files.hbcatherinewriting.com/uploads/1/3/1/8/131871585/xogijabutabalubavo.pdf
    • http://files.earthfirstfarm.com/uploads/1/3/2/7/132740533/1345810.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/piteneparodetuliro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/jutesosegufusimuzuxivigij.pdf
    • https://cdn.shopify.com/s/files/1/0438/3899/6642/files/juwaxavoboruragozu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/ccvcc_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/bilixafigunaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/alphabetical_and_numeric_series_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/33474709538.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/wuxenebesuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/lipowejozojigizixekopegul.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_off0000a708.bin
a135ab72109be51bb438d099d9835bf5b360ef2edc4d9f21acce730430912e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA708 5260 bytes
font_01_sfnt_off0000b8c5.bin
eba1d9ad9275f0182b4c80bb5ad83f700977231929b1ce7e730b967d45d60488
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C5 10572 bytes