Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53f737434696ef7…

MALICIOUS

PDF

63.5 KB Created: 2020-08-08 03:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f50f4db61ce6c166d83b9fbd6c33ad1 SHA-1: 17006cffa98786831acf6ae8b028ab2822de5eb8 SHA-256: c53f737434696ef7880afcabfd2cf2d562521760473bb22035dd41218142bac2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to an 'Oxford picture power dictionary pdf'. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=oxford+picture+power+dictionary+pdf
    • http://files.cotcbos.org/uploads/1/3/0/8/130874495/1577224.pdf
    • http://files.nirvanaeventlighting.com/uploads/1/3/2/8/132814024/a4bdf9198.pdf
    • http://files.rileystevens.org/uploads/1/3/0/9/130969851/wuvemabatabekudivow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/fozexilumemeluxujiluru.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/25540603285.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/52239692531.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/tonajuralosapidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/definition_of_writing_skills_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/28548503660.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/garemarajakitofisedurup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/zegubujuruvevidazepozopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/66226249735.pdf
    • https://cdn.shopify.com/s/files/1/0438/3804/6365/files/nikoxirexuzawara.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/25889156819.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/vivojufe.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/
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/file

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b0d.bin
222e02a00ebaf754af9090bdc9986848b1df13ba5c7afa87c19a2b4ba4ca2226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0D 2984 bytes
font_01_sfnt_off000095b5.bin
1806debf72febd10800c3c5199cf956fbe787e49f3ecf12f6e4adfed17aa1c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 5228 bytes
font_02_sfnt_off0000a7a4.bin
9fd2ff74b5c4f0bcb329ac02d77fe1cc17dabaf0587b6f2dc3741b605519526a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A4 3020 bytes
font_03_sfnt_off0000b41c.bin
6ec43465520e646693511421ca0e1bf463e5479214d6d965fc333e48b12379c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB41C 11048 bytes
font_04_sfnt_off0000d9e0.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E0 16344 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.