Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7d555d06ca0a46…

MALICIOUS

PDF

46.4 KB Created: 2020-08-20 13:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ec6c2ddc9d8534d3e78b98bccbd7ea9 SHA-1: 66751e551d11165978239d64bd0c9f9d235a2f9b SHA-256: 8b7d555d06ca0a4612a24988bf8b71c4703b6c316e2b37ebf90148e40f4c0315
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one critical heuristic identifying it as a PDF link farm. The primary URL, 'https://ttraff.com/pify?keyword=bit+mesra+patna+application+form+2018', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious content or manipulate search engine results.

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=bit+mesra+patna+application+form+2018
    • http://files.southeyeclinic.co.uk/uploads/1/3/0/8/130814531/8750812.pdf
    • http://files.lifestylenmorenow.com/uploads/1/3/1/6/131606260/1ef107b04c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/tigitizuxajulekisujitiwok.pdf
    • https://cdn.shopify.com/s/files/1/0435/6826/7423/files/time_dilation_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/22670921270.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/69023363468.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/36181339109.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/letowusesamifesafinevef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/aisc_steel_construction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/82176081189.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/swarm_robotics_seminar_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/calculus_by_larson_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/con_calma_full_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/rotolivixijegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/41294413601.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_off00006867.bin
af36992e6118d69548176a0d67f515e00f7d9010b049dc28c309b6d3ca21afd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5520 bytes
font_01_sfnt_off00007b04.bin
cbf1fd799f885ff3c77d3c36f3b4bd40896cb902a07ba09b7e87c382d2fc6ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 10312 bytes
font_02_sfnt_off00009e4d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4D 4324 bytes