Malicious PDF — malware analysis report

Static analysis result for SHA-256 3646f178facd7c47…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 19:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5b2bebbc0a9fd9905f3c4ce57b084c7 SHA-1: fbfa84c8d9a4459540860082f11524324d8cbdcf SHA-256: 3646f178facd7c47ddbf79fdb378fa63f98c1c85588b7d950e989048f683bfa4
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic further supports a lure-based attack pattern. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=simple+past+irregular+verbs+worksheet
    • http://jerowik.tomgayda.com/uploads/1/3/2/7/132712615/7486942.pdf
    • http://files.prbynautisteph.com/uploads/1/3/2/6/132681482/belososozoxus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/liditudixavefixadesolek.pdf
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/41223002027.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/xoguvewifepubamekabeb.pdf
    • https://cdn.shopify.com/s/files/1/0445/7424/5023/files/chernobyl_podcast_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/bolegimezugibefelulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/58795599889.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/causas_de_alopecia_areata.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/form_interrogatories_breach_of_contract_california.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/2008146124.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/23399842413.pdf
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/multiplying_polynomials_expressions_worksheet_answers.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_off00004dff.bin
97d731725593c5837bd86847101d1729471258e269e3b2700f6ddd273068b8ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFF 5692 bytes
font_01_sfnt_off00006145.bin
8a5c440d3ead6c30e00d41f6f035de7ed0b48237e53ad6ced2062c89dba2ea97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 9656 bytes
font_02_sfnt_off0000827b.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210
pdf-font-stream PDF embedded font (sfnt) at offset 0x827B 16060 bytes