Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f7fa031e6bded1…

MALICIOUS

PDF

57.8 KB Created: 2020-08-04 02:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c0a3c54d7014be9fd971b608fd29ce SHA-1: 8eb21f7f79cdd8fb862c675a60590ebdf5570ed3 SHA-256: a3f7fa031e6bded104cd86c7e429c93597361e1cf27cc73a45873a79f9db3c15
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded external links. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves as a gateway to further malicious content. Another heuristic flagged the document as a 'PDF SEO Link Farm' due to the mass of external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content through a compromised platform. The document body contains garbled text and a URL that appears to be part of the link farm, reinforcing the observed malicious pattern.

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=bollinger+bands+trading+strategies+that+work+pdf
    • http://pifobug.zemanmfg.com/uploads/1/3/1/4/131407535/6155765.pdf
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdf
    • http://files.bgphotographic.co.uk/uploads/1/3/0/8/130813054/3135145.pdf
    • http://files.sambacostumeparis.com/uploads/1/3/1/4/131455463/sozugud-kubuxoxenotuvof.pdf
    • http://files.jostkatsound.com/uploads/1/3/1/8/131857465/7235167.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/bixanikutogeriko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/pearson_algebra_1_common_core.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/timidez_y_ansiedad_social.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/36453330914.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0589/files/ludzie_bezdomni_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/jinoget.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/4394909505.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/27746817191.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/antrenmanlarla_matematik_1.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/la_guns_setlist.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/gov_time_server.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/93299792278.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/dajojimefir.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/
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094cb.bin
db8828c0f7effab085dbfe95ab7b1a679ef79d0ce08c478ece657022193f0a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CB 5436 bytes
font_01_sfnt_off0000a746.bin
89d067c740614d32c5e5f76049c7357126724cc8a401c1519e3b7692a2de2fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA746 10664 bytes
font_02_sfnt_off0000cbb4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB4 4324 bytes

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