Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49d732e0bf32fd1…

MALICIOUS

PDF

52.6 KB Created: 2020-08-12 09:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a419a2e02deb205ebe4d297d1bdb7585 SHA-1: 3209194737b7b0611fd9339dca54982415bc897e SHA-256: a49d732e0bf32fd1566038696831558647895b00f1e5659c7cf2be57b650a985
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=morte+nas+nuvens+agatha+christie+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious redirector. No scripts were extracted from this sample.

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=morte+nas+nuvens+agatha+christie+pdf
    • http://pakav.westcountryhearthattack.com/uploads/1/3/2/6/132695535/warimogovokivuv_sowegabef_pobuvolo_bezuwudaj.pdf
    • http://ponizud.newukmusicals.co.uk/uploads/1/3/2/3/132302780/bozekigumi_pawor.pdf
    • http://files.royaleorchids.com.au/uploads/1/3/0/8/130813528/df060d17.pdf
    • http://files.coolumtouch.com/uploads/1/3/1/3/131383510/misaxujisowax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/53781216800.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/auditoria_financeira_teoria_e_prtica.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/lurumefozemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/51377168030.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/vuxovim.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/rakeketigu.pdf
    • https://cdn.shopify.com/s/files/1/0448/4556/4065/files/english_to_marathi_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/select_col8_1_from_1yqcjjcml9hryi_dk-_py55fmwzkttiq2wa1l5lies.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/50916240873.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/97283455829.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/domain_and_range_worksheet_with_answers.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_off00008f82.bin
eb17603fecbfcd09ab88dda6437ddef19ceabd7557a9c5d04087266a667dbfa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 5452 bytes
font_01_sfnt_off0000a213.bin
4c8521ae8ca588d90c3015ffdc078012a68d748abc72cbd9306e4eef1da3ceea
pdf-font-stream PDF embedded font (sfnt) at offset 0xA213 10104 bytes