Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2bec2d9f4f1188…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 18:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28f66d47d04954a02b38ac50d49ca032 SHA-1: 6861a08092bfc4cc511eb5b88153dcf288db0def SHA-256: 8e2bec2d9f4f1188478f500305bb3cc2dc8ffc98474b5b89b40492a5c6c648fa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=lp+asma+pdf+2020'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains text related to 'lp asma pdf 2020' and embedded URLs, reinforcing the redirection attempt.

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.ru/pify?keyword=lp+asma+pdf+2020
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • http://files.j-impulse.com/uploads/1/3/1/3/131384589/wisejik.pdf
    • http://files.yumaeastlotowners.com/uploads/1/3/1/3/131383771/sopakamibozokusogete.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/24535776827.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/21388715128.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/68892825560.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/rixeletovusisekarapinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0220/files/91881097521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3483/5094/files/zuroraruxapamazave.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/glencoe_algebra_1_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/80038193991.pdf
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/save_from_net.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/68719692876.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/fazos.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_off00007569.bin
851b6e36016b60767543071b789ead3e5aa1ee492dae24538da6bc696a1337b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 5276 bytes
font_01_sfnt_off00008752.bin
ea5ca83e838abec92aef0a7b4ffa609085743862825e6bf8abe57fee38fce3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x8752 10604 bytes