Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5aea73a71b6f8b…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 21:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689fb59e091655e3074296d7057ac677 SHA-1: 37878d3b7adbde21d9ccecc9e7fd0fbb4274ac7e SHA-256: 9a5aea73a71b6f8b080c69f036db91b2ddd5749d0c3924bb466a5540b5c77c46
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=cleaning+bid+proposal+template+free'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the true destination or distribute content widely. The document body, though heavily obfuscated, contains text related to a 'cleaning bid proposal template' and the malicious URL, reinforcing the lure.

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=cleaning+bid+proposal+template+free
    • http://files.teachingandlearningwell.com/uploads/1/3/1/6/131606844/nosoro.pdf
    • http://fiwitibok.shindigpublishing.com/uploads/1/3/0/7/130775388/1906585.pdf
    • http://files.dianneodell.com/uploads/1/3/1/4/131407233/totomukemojuv-lofagixe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1656/6422/files/76361999175.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/slay_the_spire_keys.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/zevudalivuzi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/nivafezifirexeduxivowunux.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/wilotekemaxa.pdf
    • https://cdn.shopify.com/s/files/1/0457/9200/2204/files/alias_elasticsearch_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/bibubemokifepufegibuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/69762660482.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8073/files/91574431269.pdf
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/98753371968.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_off0000692d.bin
ed39ab67c9ec6a8dfdc515dafeda73a210f7ea72378f9beef96f4e1fbcf998b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 5404 bytes
font_01_sfnt_off00007b6c.bin
20c25760ac9a548809cc106c9b21c0486c5d7ee18d0b383891688cd0f665a5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 10704 bytes

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