Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f444b1153f2428…

MALICIOUS

PDF

43.9 KB Created: 2020-08-23 22:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1925d1b20def856c7a5bc1cdbe804e9 SHA-1: 5fcea0c2c712d21e877831383446ea3e335e8dbb SHA-256: 44f444b1153f2428c267e306fc73a3fca1a3cb6b144a335b7b6fc855cfe1fb3d
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as a resource for 'analogies worksheet printable'. One of these links, https://ttraff.cc/pify?keyword=analogies+worksheet+printable, is a known malicious redirector. The document body is heavily obfuscated but contains the same lure text and URLs. The primary attack pattern involves redirecting the user to malicious infrastructure via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=analogies+worksheet+printable
    • http://files.dynamicmomenterprisesacademy.com/uploads/1/3/0/7/130738970/daxob-zinonotawopati-dopizatorolubo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0623/7604/files/ximudegufane.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/81331058033.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/neural_plasticity.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/29862781798.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/android_emulator_ringan_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/pesapubevaxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/mohamed_benchicou.pdf
    • https://cdn.shopify.com/s/files/1/0437/2158/8888/files/49454720831.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/sutadaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3298/3190/files/68631540410.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/gumepoxinunixutevuzekaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/37011010147.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_off00006811.bin
382d2adabb6dee2992f2f2639a2e4880c9d609c3c08fd90cae637e49a7363522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 5368 bytes
font_01_sfnt_off00007a5a.bin
5ebfeb324d7639f5c8cfc13e813031298145e8f4da92cd0a14a8529dfca04da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 12096 bytes

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