Malicious PDF — malware analysis report

Static analysis result for SHA-256 209f85a4991a0423…

MALICIOUS

PDF

67.5 KB Created: 2020-08-04 19:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677ed9e219d32260f307914bbb2b0144 SHA-1: 5858e3d5283fb93a524535e7a70b0a8a29802bfe SHA-256: 209f85a4991a042381cb93438e122b980cc7379ce34e93000552942a3150db3f
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for 'Becker CPA exam review 2020 pdf'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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=becker+cpa+exam+review+2020+pdf
    • http://sanetevun.larryjfalls.com/uploads/1/3/2/7/132712207/62234c2d335.pdf
    • http://files.amsetcen.com/uploads/1/3/0/8/130874250/1530216.pdf
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/73925123093.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/87480832410.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/37882361399.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1854/files/zapojotojazikox.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/sociologia_della_comunicazione.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/25832798452.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/davokigezere.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/kosekoninomir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/754829588.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/gipewewibedopafikotifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/62777871512.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/90630556425.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/18699804323.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a444.bin
4f46d70af526f0f3a08c79b03f460e065bf1be2a28c5af296fe68fe39f4aba06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA444 5192 bytes
font_01_sfnt_off0000b603.bin
5e4a70e6abb3ca14b4611e4d5a985c4dccec31bbe02c695af56b1a099d9b9e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB603 11148 bytes
font_02_sfnt_off0000dc21.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 16092 bytes
font_03_sfnt_off0000f0e9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 4324 bytes

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