Malicious PDF — malware analysis report

Static analysis result for SHA-256 c688e38f22ea9bda…

MALICIOUS

PDF

42.0 KB Created: 2020-09-18 20:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 608fcdc6bfc1a7a6bc6a1dc6a644543e SHA-1: 62f0bf9533fb946c8018297a4b60b1b3005e0ad4 SHA-256: c688e38f22ea9bdac6a8fecaf1617187893678bbaba4c4e4cbfe56d31f7625b5
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a high number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One specific URL, 'https://ttraff.me/wix?keyword=tecnicas+de+redaccion+coherencia+y+concordancia+pdf', was flagged as a known malicious redirector. The document body contains garbled text along with several URLs, reinforcing the link farm heuristic.

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.me/wix?keyword=tecnicas+de+redaccion+coherencia+y+concordancia+pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/effects_of_alcohol_on_students_academic_performance.pdf
    • https://cdn.shopify.com/s/files/1/0449/3590/5448/files/1st_grade_writing_complete_sentences_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/causes_of_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/rumufujejimometetugud.pdf
    • https://8259ff6b-a1f9-4569-9f48-1e54deee44f4.filesusr.com/ugd/221f3a_e1bfd179e3c94b878c9b488acd8fde72.pdf?index=true
    • https://a40aaf2e-3e5b-4110-ab53-32729d35e77b.filesusr.com/ugd/3f80ec_32e14c16eefb47398ee30f83d0fd7606.pdf?index=true
    • https://8b7702bd-eaf3-4118-8cc3-00e2ce938af4.filesusr.com/ugd/78daac_719b3e3f4e9c4e6d97b6c0db22ec594a.pdf?index=true
    • https://e5ba9235-936c-4fd8-8b6c-b6ed8ecab1fa.filesusr.com/ugd/e1c37d_874551c8f77e4349aab6a3140ff94ba4.pdf?index=true
    • https://06a65c78-9b1d-4633-a624-72ab9afb4810.filesusr.com/ugd/d93890_e4ea1735d4664a75bd573d14da7920fd.pdf?index=true
    • https://593ca81a-6ccc-4c72-8474-b9cede567f8c.filesusr.com/ugd/eddc50_3da535b4d7f9428ca00e100cd13dcf05.pdf?index=true
    • https://16ee8420-09c3-465b-ada3-1e9d1e48aa04.filesusr.com/ugd/b914b5_86c9805e1b8444418547e96d26eff117.pdf?index=true
    • https://c8f3d2ee-f113-404d-82f1-e4f0c884fb36.filesusr.com/ugd/cbe7f7_52cd56c3a92145c982be5737301e474f.pdf?index=true
    • 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_off0000643e.bin
1b762e25536b717b7efcd2ecc29d978bbde771295de730286d845f7a271575fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 5260 bytes
font_01_sfnt_off00007624.bin
df17200181d0b87d39ef905ccc46a2f130832201f21c12a5896746af61f3aa52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 10752 bytes

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