Malicious PDF — malware analysis report

Static analysis result for SHA-256 252e3f479d60060f…

MALICIOUS

PDF

38.5 KB Created: 2020-08-14 00:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9230abb25982e58e2470401267808a63 SHA-1: 2550c1a8b14b55ea1c90f66ba287b9bbd4e20a4b SHA-256: 252e3f479d60060f38797eab58fd2d17c8386f0c3af2a59fab2e394dfea8287d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is presented with a keyword suggesting a manual for a Bernina 770 sewing machine. This indicates a social engineering lure to entice users to click the malicious link. 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.cc/pify?keyword=bernina+770+manual
    • http://files.doubletalkspeechtherapy.com/uploads/1/3/1/4/131437845/9926927.pdf
    • http://vulogu.evelyncanne.com/uploads/1/3/1/3/131383791/9752014.pdf
    • http://vanevalek.lonsdalepark.org/uploads/1/3/0/7/130739720/gozarolaki.pdf
    • http://files.drsimoneryan.com/uploads/1/3/1/4/131483491/d8898e0c5.pdf
    • http://gadoba.yestoyouthgala.org/uploads/1/3/2/8/132814930/420062.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0432/8957/5588/files/98480066156.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/pegelisavin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/zixilanuladu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/wosaxofizekav.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/alter_ego_1_cahier_d_activits_cd_audio.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/41066141018.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/85983568736.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/mcq_on_antigen_and_antibody.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/98600703720.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/23544180429.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/benny_and_the_jets_meaning.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_off00005abc.bin
c65ca1d031025c46bb210a8463d87fdabcc7ec7146d8cc454e1b52263c678960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC 4924 bytes
font_01_sfnt_off00006b60.bin
c1cb91261ee0c841f8d9880e2e4993acd562ec1df1610cc8e2e2f7be5de81eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 10028 bytes

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