Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13dcac037b675f4…

MALICIOUS

PDF

43.8 KB Created: 2020-08-15 10:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be51e620ba2f424998fabd381914993 SHA-1: 67e427a6aeb3b0cf4b2d21a88db9e028df12d338 SHA-256: b13dcac037b675f43085d3d95ee52db80a8a425d25571b01ca9744b80e7ac928
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=tcl+commands+in+sql+pdf'. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute further malicious content. The document body is heavily obfuscated and contains embedded URLs, reinforcing the malicious redirection and link farm findings.

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.cc/pify?keyword=tcl+commands+in+sql+pdf
    • http://jexafux.northfieldrobotics.com/uploads/1/3/0/7/130776445/164de.pdf
    • http://files.ampdguitars.com/uploads/1/3/0/7/130740325/bemasegoliru-mutavujuveze-woxenuwipavij-zenod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/mofewofesesobune.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/beatles_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/balladen_klasse_7_klassenarbeit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/27728933819.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/types_of_buildings.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1989/files/business_correspondence_report_writing_sharma.pdf
    • https://cdn.shopify.com/s/files/1/0452/7387/4594/files/wubelotebumew.pdf
    • https://cdn.shopify.com/s/files/1/0453/8499/0888/files/effect_of_air_and_noise_pollution_on_traffic_police.pdf
    • https://cdn.shopify.com/s/files/1/0432/2512/0927/files/95579441153.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/58945457979.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/kidudamukaw.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_off00006ba5.bin
8c1d94b0a44cec8e06f806cd86825b4dfe8e6df2dea686303f56e32518711bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA5 5280 bytes
font_01_sfnt_off00007d84.bin
27fc1e34f7f2be158e2f20f98bf8913b565aa1363ea284d81cf57a1f70b6765b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D84 10904 bytes

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