Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae877bb46addd324…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 22:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d292206b832847440757afdc5ad8917c SHA-1: 01df90f0e4fb7984d288f61b0afef9c85f479657 SHA-256: ae877bb46addd324272f4a331dfe926362456a5a4d97a4195e092ad26e76bdca
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. The primary malicious URL, https://ttraff.ru/wix?keyword=printable+scale+ruler+1+100, is flagged as a known malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body is largely unreadable binary data.

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=printable+scale+ruler+1+100
    • https://static.usrfiles.com/ugd/b8c837_1779f72805b5484d8595fa4a2d796370.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff2533c4c3f4d0db9f272b2c5c62050.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_8b22fef351c74a08bea314e93e1c7f50.pdf
    • https://static.usrfiles.com/ugd/77d535_81e69f931340474b989497de59217bea.pdf
    • https://static.usrfiles.com/ugd/b8c837_41401a2f0eea43b1b83d15ee84866c36.pdf
    • https://static.usrfiles.com/ugd/e643da_137da9eb99d34c959e84e3d8f97bad7d.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/graphic_design_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/topobolebosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/12824228334.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/59607360653.pdf
    • https://cdn.shopify.com/s/files/1/0431/8383/3249/files/bevonagulape.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/vojafijuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/cours_sur_l_argumentation_3me.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/bogimujanaxadadiwuvomive.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/nixizutetalabuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/11084282893.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/1/0435/2973/2245/files/110

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5b.bin
f670e1fe200018e86b13d57cec615ba47cee94d64cb05dbd8a385f3828b4d98f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5B 5128 bytes
font_01_sfnt_off000070cf.bin
274e20638ab5ba425722baa114f5ca80dac564a80dea58a98e2aaedb9cdf5aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CF 9784 bytes