Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1f041d59c0bc97…

MALICIOUS

PDF

54.2 KB Created: 2020-08-30 20:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bae9dfc109cc4caa94c62f86c74fbeb SHA-1: 145cd7b13a58fbd98437b907352de4475869dfff SHA-256: 5a1f041d59c0bc977ef8f731dad4faa1a8a3bb7e3772ce80a1a3359d25d498c3
120 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 a PDF link farm heuristic, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=warriors+river+of+fire+pdf', confirming the malicious redirector. The primary attack pattern involves luring the user to click this malicious link.

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/wix?keyword=warriors+river+of+fire+pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/pobakitirigosu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/53877491756.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/vobimiwakalek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/66501033240.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/aide_memoire_francais.pdf
    • https://cdn.shopify.com/s/files/1/0440/7971/0360/files/kefuxafemosesulukojosaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/88768829981.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/39863069927.pdf
    • https://cdn.shopify.com/s/files/1/0435/5257/1555/files/ketuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/tapuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9567/7346/files/tamil_movies_free_new_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/spelling_bee_grade_1_word_list.pdf
    • https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb856a9c6ec4f37b96d4757c6fd5147.pdf
    • https://static.usrfiles.com/ugd/b8c837_831429a911fb4c8d8575bd1f4600c878.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8fa0036ef7465ea804f506bcd2eca4.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_off00008a9f.bin
0efe132590cbfb8f93363c48495632ef8f2c077411a27d461d3e09cf36649a22
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9F 4676 bytes
font_01_sfnt_off00009aa4.bin
82d1f8a36be9de4b01aff7f86cc3c1e3d34fcf75ac96bcacb4c05d54cf49d21a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA4 10192 bytes
font_02_sfnt_off0000bd72.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD72 4324 bytes