Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d5e33b3553d0cc…

MALICIOUS

PDF

53.2 KB Created: 2020-08-28 11:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa37d9c816d271801da3eef795107e9e SHA-1: da3c1eb8f65eb4e418179485c5fde0ead5b2e765 SHA-256: a3d5e33b3553d0ccb2a2359d8c2258faae9916e83063fb03f320b6dedd19526e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to a birthday greeting and the malicious URL, suggesting a social engineering lure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=feliz+cumplea%25C3%25B1os+mejor+amigo+carta+l
    • http://files.oxfordcitylionsfutsal.com/uploads/1/3/0/7/130775808/5825995.pdf
    • http://files.nsanegriplegendcarscom.com/uploads/1/3/1/6/131637562/ruferolemezo-fukaxajuvo-kezewovupawat.pdf
    • http://files.matthewlmcguire.com/uploads/1/3/1/4/131437005/tisixi_konufuwivaxemir_sasuvijip.pdf
    • http://mapajeza.osuepic.com/uploads/1/3/0/7/130739204/pubiliz.pdf
    • https://cdn.shopify.com/s/files/1/0450/3673/2566/files/xamuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/sign_language_alphabet_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/15589363955.pdf
    • https://cdn.shopify.com/s/files/1/0429/2748/9183/files/fivavakiduvivupov.pdf
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/milib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/potikejige.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3379/files/judamafuvune.pdf
    • https://cdn.shopify.com/s/files/1/0463/2634/9985/files/din_en_iso_12100-_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/lotigutijavabigozorabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/jarinotuzenenir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/pevipab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079b7.bin
d29a04bb2f769d36e89496c4cd774a702f0c56e32868798c89593d5c67b8f30e
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B7 5544 bytes
font_01_sfnt_off00008c43.bin
4cbd2a2625e7d30d640b86f90dcf45d9e4d41d565c79db1c9bb6edd4f34b3143
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C43 10692 bytes
font_02_sfnt_off0000af07.bin
e3c284d5442199699852709ff7a6e0917a8bfab7b0b7c5594f8d2f5418450d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF07 16524 bytes