Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87b48dbb81103ca…

MALICIOUS

PDF

46.4 KB Created: 2020-08-26 19:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9767ac9d6396498a12915156e3b99f40 SHA-1: 3236c0021c179f3833eec2560e1a06a6082da055 SHA-256: d87b48dbb81103ca3fc730fc6fc7c33b18818680b6b44c0d11b47ca338f478df
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=fall+out+boy+infinity+on+high+zip'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, also contains the primary malicious URL. The presence of multiple benign-looking Shopify links alongside the malicious one suggests an attempt to blend in or overwhelm basic URL reputation checks.

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.ru/pify?keyword=fall+out+boy+infinity+on+high+zip
    • http://files.addictionrecoverymovement.com/uploads/1/3/1/4/131437878/bavizaruwavukasodowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/xuzebarudanigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/kajipujimepowewoged.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/67510115492.pdf
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/functionalism_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/briggs_and_stratton_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/essential_requisites_of_a_contract.pdf
    • https://cdn.shopify.com/s/files/1/0449/2414/1735/files/46810883236.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/22738088515.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/character_is_destiny_john_mccain.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/91112013355.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006246.bin
483928f55ce1865e38ecdf4c9f606fe285eb77ad0d84bc11dddc529fbd4ec789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 5136 bytes
font_01_sfnt_off000073d7.bin
cd2677f7845f89e3a63111179ccc0c099e8d2ee808614e8d6ccf9911f26e8fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 10284 bytes
font_02_sfnt_off0000973d.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973D 16204 bytes

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