Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cf000d8c168560…

MALICIOUS

PDF

49.5 KB Created: 2020-09-09 12:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d35b2736e92862febcd28819375e14bb SHA-1: 3bc9bdb5022342d35d2d7be4a746cdf4f6d0959a SHA-256: 34cf000d8c168560e9feda288ccf5ee38d1e6e3f22f67f56ff432355c9011f56
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.link', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'scert ntse admit card', suggesting a lure for examination-related information. The presence of a link farm with numerous external PDF links further indicates malicious intent, likely to distribute further payloads or phish for credentials. 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.link/wix?keyword=scert+ntse+admit+card
    • https://static.usrfiles.com/ugd/930050_8fbca1e9098f48bfbd8871acf9e7f461.pdf
    • https://static.usrfiles.com/ugd/9219f8_96a5e813b11744f8af46e55a42c4fe86.pdf
    • https://static.usrfiles.com/ugd/c1de29_d0e89c0b828a4b089a65abb09b2dc0a6.pdf
    • https://static.usrfiles.com/ugd/c618e9_a1f5b75a50be477cb62a7554c2c5b6b0.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_c7c719b6340543699f97a411e2b3f7b5.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/analise_fundamentalista_de_aes.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/15779800766.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/5261171076.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/72814466012.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/data_request_form_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/andante_andante_piano_sheet.pdf
    • https://static.usrfiles.com/ugd/122077_74e592a33d9a4c6997fed566cfc1ac63.pdf
    • https://static.usrfiles.com/ugd/b80405_8d114521f61246169586d6fac016030e.pdf
    • https://static.usrfiles.com/ugd/003b86_64acfdc2ff6946528db9de174a77e00d.pdf
    • https://static.usrfiles.com/ugd/cfa91a_a4803c8747544c8ab76d60b4b89ca923.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_off00005eea.bin
d8de73c7ec4fff3199f7fd89eb954f409bf230339b3197f8fb83c45e30001e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 5156 bytes
font_01_sfnt_off00007061.bin
a024cbcc81e58ec5fd762ded20d8a7c7f4ff861f3b3c0ff0659a8256f7c36266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 14144 bytes
font_02_sfnt_off00009c73.bin
83f1ed7e48187e30a33a921a6042e44441cff70586ad51630c0fd8373241854e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C73 8036 bytes

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