Malicious PDF — malware analysis report

Static analysis result for SHA-256 b493263244ccd016…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 00:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7e84030c96a88ad2f5ea4a003b54e9f SHA-1: 096368c467ea8189a44f39b5a83ef77afb30262c SHA-256: b493263244ccd01607ba7bd79506c144aa6fb29e96010e8c331fad61ff1ad75f
150 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.ru/wix?keyword=glenigan+construction+report`. The document body, though heavily obfuscated, contains text related to a 'Glenigan construction report' and the malicious URL, suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=glenigan+construction+report
    • https://static.usrfiles.com/ugd/99afdc_50fe98993d0147d18d4b3a0386c6f9b1.pdf
    • https://static.usrfiles.com/ugd/7598fa_f7b55391ee314bb58764ce35256dc3a8.pdf
    • https://static.usrfiles.com/ugd/0aab01_3b7e98cd1bd94714aacba80cb00d3718.pdf
    • https://static.usrfiles.com/ugd/804ff6_2f3d724daa3d487ca57277ae8e1f4048.pdf
    • https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/fuwajibuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/96105372476.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/zul_farrak_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/quit_claim_deed_oklahoma.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/14142114973.pdf
    • https://static.usrfiles.com/ugd/b8c837_86051289761a4ed39fb280d958678f6a.pdf
    • https://static.usrfiles.com/ugd/97493d_1f989ed7655e453d99baefd542f32d42.pdf
    • https://static.usrfiles.com/ugd/32777b_ec92da8e68694f06aa95f3a76d15cc15.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_553c3589f1f642b598b7979d326d7d3c.pdf
    • https://static.usrfiles.com/ugd/93c935_960ef9439e9544b6bfa2c37f1001be19.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_1722d08e8c6b4bd6998ecfd3bef1f476.pdf
    • https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.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_off000060b9.bin
0802a104a33926fa9c44758bafb54fbeb3cbabac98050666c0e9f653222391a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 5016 bytes
font_01_sfnt_off000071dc.bin
28f759f49edbe0ff449999d1a77c1a06c7c6adb7da1fcbc4c348626b1aa397e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 9812 bytes
font_02_sfnt_off0000935e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x935E 4324 bytes