Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8eb85fd6ab7aed…

MALICIOUS

PDF

46.0 KB Created: 2020-08-09 19:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b293e5a03af077d9e50c1905db738a28 SHA-1: 92f2963e5db1aa0b2362b3bf6763c673520f2a88 SHA-256: 2e8eb85fd6ab7aed2546055759795e699b951dc25e8a79d0ad7bb5404fd4aa61
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'core java interview questions'. The link leads to 'https://ttraff.com/pify?keyword=core+java+interview+questions+for+freshers+pdf+download', which is a known malicious redirector. The document also contains a large number of external links, many hosted on Shopify, likely for SEO manipulation to increase visibility of the malicious link. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=core+java+interview+questions+for+freshers+pdf+download
    • http://files.desertdeerart.com/uploads/1/3/1/0/131070561/dipogitepupififu.pdf
    • http://files.liveandwincoaching.net/uploads/1/3/0/8/130814596/migak.pdf
    • http://nakaxal.vastcomtech.com/uploads/1/3/2/6/132683188/revonive_lorigaw_defotamasuxoniw.pdf
    • http://files.originalsexyslave.com/uploads/1/3/0/9/130969004/ca2abe.pdf
    • http://files.weberworks.us/uploads/1/3/2/7/132712306/xuketuzutirumekusalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/44494056350.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/papixusisijipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/bestiario_de_arton_vol_2_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/netobinezowevonaviges.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5805/files/98138915048.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/66115488059.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/govusotaxexusipelogatet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/41999368704.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/nunapifutodok.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/786452230.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/lizukoxanixibemuxubel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/6599920486.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_off00007438.bin
3bc05bd75bd706a8e920b5c2fbdd7d739d9b66463380433ecc60147e24cb6559
pdf-font-stream PDF embedded font (sfnt) at offset 0x7438 5388 bytes
font_01_sfnt_off00008699.bin
4a816f5b1c1a17d821b92534676a7d87c157649c2634a7f5c94d682a8a9f0d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x8699 10592 bytes