Malicious PDF — malware analysis report

Static analysis result for SHA-256 c796639c35ebe30c…

MALICIOUS

PDF

49.6 KB Created: 2020-08-12 04:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5718061b81fe009d3421ae6e05b1a617 SHA-1: 3907639b078bd0c528b6cf198f37ef18550e2a65 SHA-256: c796639c35ebe30c8e7259c80933baa261d43e6973b9238118e61de1a2220cc3
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one pointing to a known malicious redirector (ttraff.ru). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to inflate search engine rankings or distribute malicious content. The presence of the malicious redirector URL and the sheer volume of links strongly suggest a malicious intent, likely for SEO manipulation or user redirection to harmful sites.

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.ru/wb?keyword=sonnet%2073%20pdf
    • http://wazut.mlledowding.com/uploads/1/3/1/3/131384721/8684261.pdf
    • http://files.hcmbbtourney.com/uploads/1/3/1/3/131380445/500a0ded6f7d.pdf
    • http://gagedi.woodcraftguildtasmaniainc.com/uploads/1/3/1/6/131636644/ruzijemefototi-wofuko-negokuni-xowenugogi.pdf
    • http://woxud.alwaysbringcookies.com/uploads/1/3/0/8/130813866/5759069.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6797/files/gre_analytical_reasoning_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/57009850946.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/56945459511.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/wotakupijajogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/southwest_airlines_print_boarding_passes_and_security_documents.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/askeb_abortus_inkomplit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/american_english_file_1_workbook_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/53524503090.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/75533892841.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/astrophysics_and_space_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/zezutorulikaruluxewumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/vidizumox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/xotevuwunozez.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_off00008666.bin
de751125526924028eafb08ee5a83dc707aeabdcfb80b2b803cfd0c79e4cab5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8666 4864 bytes
font_01_sfnt_off0000971e.bin
12a2254a7d526a9fa5c639e88e48a81c0fb47a46ee572cf4cb93b07fd6783190
pdf-font-stream PDF embedded font (sfnt) at offset 0x971E 10104 bytes