Malicious PDF — malware analysis report

Static analysis result for SHA-256 97555b9b09d70826…

MALICIOUS

PDF

67.1 KB Created: 2020-08-30 09:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6c24f2ffd4e8cf3088b0a83da4f860 SHA-1: cb4f99e2a5231776a7c2d9c6ea52a5df877205a7 SHA-256: 97555b9b09d7082611e2916154debb4909627407499fbe800336e6e40d55966a
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised as a download for 'Eclipse mars ide for java developers'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. No scripts were extracted, limiting the analysis of further execution chains.

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/wix?keyword=eclipse+mars+ide+for+java+developers
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/de_clerambault_automatismo_mental.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/98343558634.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/complete_english_punctuation_rules_farlex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/40575006666.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/55066165591.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d0ee8c5c39145488196c75ffa8c7110.pdf
    • https://static.usrfiles.com/ugd/b8c837_13cec9d0f67f43a7acac605aaaaa5d1e.pdf
    • https://static.usrfiles.com/ugd/9374a7_1fea05d857874b99b997f2c26defff04.pdf
    • https://static.usrfiles.com/ugd/07625c_d8c74df7496a4bb1a243b14a256c617b.pdf
    • https://static.usrfiles.com/ugd/89064d_28eea2847cba4058bdfc73bc160d6a9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c09e7d27cbe64f96aee667eca0fce3a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e66fdcf727c4596b36f7747d3006f46.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/55190859846.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/vogivi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c602.bin
980f26447e64dfe00438ef1bcb5a1bad3ef942e9076ff1bd8095577e3eb4c549
pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 5392 bytes
font_01_sfnt_off0000d84b.bin
a70d1110034c414fd6bc3db67474b72c2250ee898cea19845e65a801643a56e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 11840 bytes