Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e7952c562af3b4…

MALICIOUS

PDF

35.6 KB Created: 2020-08-25 09:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 541fc2f4c214c5e7f9bb74726decd24f SHA-1: dc9ddf4683c2da971f6e4942f6025e5b60a3e98e SHA-256: 87e7952c562af3b4b63dac4c70ba5aebded73329d540049e2ece3638a9ddde0c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=arcsoft+webcam+companion+for+sony+vaio', is identified as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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.ru/pify?keyword=arcsoft+webcam+companion+for+sony+vaio
    • http://majaro.foothillsphotogroup.com/uploads/1/3/0/8/130814328/7803910.pdf
    • http://files.stelizabethjulian.org/uploads/1/3/1/8/131871814/warorit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/sosifirebiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/vusije.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/conceptual_physics_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/balance_of_payment_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/94639879194.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/86065696459.pdf
    • https://cdn.shopify.com/s/files/1/0428/4946/8582/files/25312678626.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/22079107056.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/49998285923.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/47180422593.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/winubituzokevijozod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/fefagifidaxazuxupim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/java_programming_array_example.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_off00004d54.bin
9ee271fc64429e310dff819502656d50e6bf509c22d9b408b0724c840b0d4a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D54 5512 bytes
font_01_sfnt_off0000600b.bin
73b81a5703cde003b8528ac9248a46f8002253d9e1423a5a79dae6bdbae0ba38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 9800 bytes

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