Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6ce562bc019211…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 11:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 946704e23525cccb09bc798e283a1e8a SHA-1: 6606e049714fb37f5f2c7d214a817288a45eacc2 SHA-256: bc6ce562bc0192117c93cac1b324b79051dfaadbd2806e46b6a77d8ea68c0a20
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=algebra+simplifying+expressions+pdf'. The document body, though heavily obfuscated, also contains this URL and other URLs hosted on Shopify, suggesting a coordinated effort to distribute malicious content. No scripts were extracted from this sample.

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/pify?keyword=algebra+simplifying+expressions+pdf
    • http://files.spiritofthe8thfire.com/uploads/1/3/0/7/130739371/64d918.pdf
    • http://duxidit.wybntv14.com/uploads/1/3/2/7/132710712/5067323.pdf
    • http://files.maryrawsonphd.com/uploads/1/3/1/1/131164239/fexajipinuladevum.pdf
    • https://cdn.shopify.com/s/files/1/0439/2789/6219/files/chemistry_notes_for_class_11_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/74080285961.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/20198837110.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/polex.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/another_one_bites_the_dust_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/ed_miracle_shake.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/aloha_pos_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/gujozafeme.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_off000088d8.bin
7deda1031bd21108b9d6e91a07fc73818d503dbdc1b9bceb68245b51cde021be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D8 5660 bytes
font_01_sfnt_off00009c17.bin
1b5f671337635e068f68db3d9a1ff09659c092b2d89eca009f1c59f34229b624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C17 10620 bytes

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