Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48e351397c5cabe…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 20:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b2bf97786a629d6ee93ae5211d55270 SHA-1: d30d93093e5cb4a5a3b91af2a45ca63d5f170b46 SHA-256: b48e351397c5cabeb04148a2fccb1ad6fac57ecbc12310c1840e146464826ae6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=game+of+silence+book'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and references to book titles, suggesting a lure. No scripts were extracted, but the primary malicious activity appears to be redirecting users to a potentially harmful site.

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.com/wix?keyword=game+of+silence+book
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/tawopinuzovikakisaxapot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/82752311093.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cc8873b958a4a1c8d8e764c90605f5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e3e827f545842c9ad5eab9ce9d56d32.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/nonewarazerate.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/45722652919.pdf
    • https://cdn.shopify.com/s/files/1/0454/5937/4230/files/naruto_shippuden_opening_song_blue_bird.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/11647433133.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f31e5b92342443bbf0fd6b95516c983.pdf
    • https://static.usrfiles.com/ugd/0aab01_96271f9b95244f37819345039b8d63d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e20110fd41f4636b6ca4aa6395a8683.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_off0000741c.bin
b14c1e38d6ac549e0f5b1fdd09412a85b838d93729de52ccae5efba42294b601
pdf-font-stream PDF embedded font (sfnt) at offset 0x741C 5168 bytes
font_01_sfnt_off000085ab.bin
0c1417d8b545632ec8ef07dbaea739374f9cf707f5f5b8a898a90ad41ebb51c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AB 9848 bytes