Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ab94258ea2ec3e…

MALICIOUS

PDF

79.0 KB Created: 2020-08-29 04:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d577506974a2bfee6ca11b38360ae700 SHA-1: 7d4f65186ec62f4a46868ea6247ef2c99a8052a7 SHA-256: 12ab94258ea2ec3ebe35d05e83245fec46a1b1dac89b163061b5d7c9a8736c5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as a search result for a book title. This indicates a phishing or scam attempt designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=manual+de+guerra+espiritual+de+alto+nivel+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_ce1ae2814a164931856c0e3559894d0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_df1ceae2016f47e68a82c1a06d8fd37e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ecf4f1b885f4d6d99c7b1653b0db2a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_56c778c42d384d11aaec11678f32ac8f.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7810/files/86302093711.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2529/files/attendo_informazioni_in_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/big_data_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/quarterly_report_on_federal_reserve_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0451/4122/9733/files/life_after_death_damien_echols_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_96fd123c0f7b40cea8ed680909d9d984.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e034a549c214af7834858400ab585ea.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8da.bin
bcb784c2cf4d38ad1d3e01177288c6dc32d14074afc93e37ddbed474825a3d74
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 5156 bytes
font_01_sfnt_off0000fa79.bin
fce9989afd81df23c309a57597e432e701223e1e5d5bf3653ef54ca5b5bef360
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 11168 bytes
font_02_sfnt_off00011eb9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB9 4324 bytes