Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd8f5d02d63c6a9…

MALICIOUS

PDF

43.7 KB Created: 2020-07-28 11:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76bca317f453fc03974eb4de3fd17ed8 SHA-1: 07e23e3775d03fd2f9010ad356a5ce529f387469 SHA-256: dbd8f5d02d63c6a905fef325d360f9e05b1036857961dbb4e31b282ca2b9e932
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'bake sale flyer free template'. The primary malicious URL identified is ttraff.com, which redirects to a page with a bake sale theme. The file also contains a large number of links to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=bake+sale+flyer+free+template
    • http://files.catcollaborative.com/uploads/1/3/1/6/131637307/9990369.pdf
    • http://files.alittlehand.net/uploads/1/3/1/4/131407877/besimagozeme_ritodapupal.pdf
    • http://files.dufferbud.com/uploads/1/3/0/7/130739004/kawelutekisawi_rojobutaf_kusox_leraxu.pdf
    • http://files.foustequine.com/uploads/1/3/0/7/130776755/naresopenotafazimed.pdf
    • http://files.catcollaborative.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/fekukapimumoditilagif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/36002063750.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/12732384590.pdf
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/tepusoxozibulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/42476539263.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/86193868230.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/49643749276.pdf
    • https://cdn.shopify.com/s/files/1/0435/3327/1191/files/tuberawopivajoda.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/xidimigibomapuradez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/96785859128.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/fedosuzejoxetemek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/10405763155.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_off00006e80.bin
5573969f9fee308312867a0df84263f254abcc9c9b40ae5022a339b511d6f0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E80 4788 bytes
font_01_sfnt_off00007ec8.bin
4dcc5b2dc96615c350e2862d4021a4a85b6f373a6a4e0ee32e3b3747f252493d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 10196 bytes

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