Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a64f1d5cb89537…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 05:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c74ddd7945138fe6a3b85b9f4e0851 SHA-1: eaf0ecab17a9874d23e59687a896b2e96c47d52f SHA-256: a4a64f1d5cb89537d65bc93bcdc0e1b7c0b1b5067889974f2421d4c0dd1cdafb
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to 'ttraff.com', a known malicious redirector. This suggests a phishing or scam attempt, leveraging the appearance of legitimate document links to mask malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct payload execution.

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=aoac+methods+of+analysis+pdf
    • http://files.morningsideunitedchurch.org/uploads/1/3/1/4/131406288/b6c549d76b9dd7f.pdf
    • http://files.livignoexclusive.com/uploads/1/3/0/7/130738700/338839.pdf
    • http://files.thechristianleftblog.org/uploads/1/3/0/9/130969659/9990588.pdf
    • http://files.sarahckart.com/uploads/1/3/1/4/131407194/balel-zosil-givovugoped-benewiv.pdf
    • http://ketom.mymisssparkle.com/uploads/1/3/0/7/130776485/bapupizija-tematemimupukiz-gekevixaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/pixiv_id_82156.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/cefsharp_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/disadvantages_of_computer_assisted_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/59223676224.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/pushing_code_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/xalagut.pdf
    • https://cdn.shopify.com/s/files/1/0437/5845/2897/files/62379114892.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/83844552853.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/40080786271.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/xomumisabilenuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/nibetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/riduxesegazunimajakibopub.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_off00006478.bin
f9365e07ec2b135dde355254290015bd49e894e6da9b6fa5d5d429365c36a37d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 5392 bytes
font_01_sfnt_off000076bb.bin
6775148ed7f0b26012d600c6c1f72d9be84c9b01572f621fb83a2efbb35cc866
pdf-font-stream PDF embedded font (sfnt) at offset 0x76BB 10820 bytes
font_02_sfnt_off00009b12.bin
c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B12 16232 bytes