Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cc1330d287d31b…

MALICIOUS

PDF

44.0 KB Created: 2020-08-14 11:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6341b049fa1ed8fd636010ad6682f56b SHA-1: f1621b6bf95b90caa5bc9e61fc0367cdb6f66495 SHA-256: 08cc1330d287d31bb51d7a1e2687cb86d0f43bea062d97bf42c242cc6832ad14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or a link farm designed to redirect users to potentially harmful content.

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/pify?keyword=bivariate+frequency+distribution+example+pdf
    • http://xafovepol.sangamoncountyswcd.com/uploads/1/3/0/7/130738714/74a6a0244b.pdf
    • http://files.kpcouncil.org/uploads/1/3/1/4/131453902/kidiru_zilix_fudedaruludixov_govabed.pdf
    • http://nipaxo.bsdcouture.shop/uploads/1/3/1/0/131069934/e3050c9b4de94d9.pdf
    • http://posesirel.2325maurystreet.com/uploads/1/3/1/3/131380213/gasujujapumebubijutu.pdf
    • http://marisod.thecuriouscatgiftshop.com/uploads/1/3/0/7/130740066/851f7cf0f97c276.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/dolatidezek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/32915101568.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/2138494505.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5331/files/56438444864.pdf
    • https://cdn.shopify.com/s/files/1/0432/9478/5694/files/fatoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9538/files/27068030391.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2952/0796/files/73509060089.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/gekaguli.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f4.bin
38fc54bfccdb238d0923981bc52849dac7864b10f99c508de03454804cd07512
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5848 bytes
font_01_sfnt_off00007ccc.bin
5c1185cd4c75e401333abc1efe9b8f03e75afb10f0383331ea7c20ed7a15a113
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCC 11516 bytes