Malicious PDF — malware analysis report

Static analysis result for SHA-256 c207e9dc66c5b81c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 01:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1550c1b7d4fc42098c60a7be0ce081cc SHA-1: e65f94678209a39decf384aa093078f8544bd46e SHA-256: c207e9dc66c5b81c0bfd22ada2f2dff20d672f36d510b57ec771ea151ce8a1d9
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a notable portion directed towards a link farm hosted on Shopify. One critical URL, 'https://ttraff.com/pify?keyword=excel+generate+email+from+spreadsheet', is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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=excel+generate+email+from+spreadsheet
    • http://zidozewil.floorexpertslimited.co.uk/uploads/1/3/0/7/130739059/xekurodukitimo.pdf
    • http://files.tranquilcounselingandwellness.com/uploads/1/3/1/4/131453278/makixej.pdf
    • http://sunuro.bullsbard.com/uploads/1/3/2/7/132712207/0c252be.pdf
    • http://files.henricobar.org/uploads/1/3/1/4/131407539/4486446dd2b3005.pdf
    • http://tafutafo.nsacchitella.studio/uploads/1/3/1/4/131410007/wazutopez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/97541286638.pdf
    • https://cdn.shopify.com/s/files/1/0428/4301/3287/files/lepefirize.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/american_college_of_emergency_physicians_headache_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/resujilujupubuj.pdf
    • https://cdn.shopify.com/s/files/1/0449/0749/5591/files/bordereau_cnss_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/3130223308.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/3268756397.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/count_to_infinity_problem.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_off00005e0c.bin
5acb5b32d218f541b18748421ffc81631491f2e586d947e81850152ea959a111
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 5596 bytes
font_01_sfnt_off000070dc.bin
92b25c999395c5a3e919e578845cc4bc7bc2a1d799baf09a7e2520c737280620
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 5304 bytes
font_02_sfnt_off00007f86.bin
822ffa249c7617a08fa009319284f79f3ca537fb1de163b3c79b4f94eb08e27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 10216 bytes