Malicious PDF — malware analysis report

Static analysis result for SHA-256 485954fe4f82bc99…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 07:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 746a1c52305a15dd5cb5451c8d898704 SHA-1: d481182b62e2aed23265d0bd0cef3e98b9cdff8a SHA-256: 485954fe4f82bc99a43a26d71a336967690b3db15ed80be01289ef3071e909fb
128 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. Crucially, one embedded URL, 'https://ttraff.cc/pify?keyword=adobe+pdf+converter+for+mac', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references 'Adobe pdf converter for mac', indicating a lure to trick users into clicking the malicious link. The presence of a visual download button heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+pdf+converter+for+mac
    • http://files.everlastfilm.com/uploads/1/3/0/8/130814652/lirivovemulub.pdf
    • http://files.bronwyndohertyart.com/uploads/1/3/0/7/130738531/bukajuwedukegen.pdf
    • http://files.thedetailors.com/uploads/1/3/0/7/130776162/e0434c1bdfe.pdf
    • http://files.artbodysoulstudio.com/uploads/1/3/1/0/131070374/e1ca5c7c21ca2.pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/67521119669.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/34828466850.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/apache_storm_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/17854706877.pdf
    • https://cdn.shopify.com/s/files/1/0446/6668/3545/files/waiting_for_the_barbarians_jm_coetzee.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/tutaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/52769610667.pdf
    • https://cdn.shopify.com/s/files/1/0440/3711/1958/files/29378380123.pdf
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/fodalafodezojanozekenow.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/6377341133.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/vegetarian_diet_chart_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/45800003901.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_off000065df.bin
d04403849041573fe62366aa179f3fd0b707eb1ff2d52beb8f34099cd6cd0a87
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 5280 bytes
font_01_sfnt_off000077c7.bin
bbca349fc74c56960eea1896b2b6b3529b258ee0e62b6ffa57cbcd486cb80fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 13656 bytes