Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad54f8b7325e55a…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 22:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f1e4c97be1d2ef53413289f123102b SHA-1: b04e874b98dff9669ddd82e3ecaf20f826d663d1 SHA-256: 2ad54f8b7325e55adb35383c26ee8bf78449540a53c165c11b068906fb87193b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign educational content, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a tactic to disguise malicious activity within a larger link farm, potentially to evade detection or to appear as a legitimate resource. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to lure the user to the redirector.

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/wb?keyword=principles%20of%20forensic%20toxicology%20levine%20pdf
    • http://files.swissmobileveterinaryclinic.com/uploads/1/3/1/0/131071256/cf3aedec28e6.pdf
    • http://files.formalpoetryetc.com/uploads/1/3/1/4/131406977/zariv-ziteka.pdf
    • http://files.qualityparks.org/uploads/1/3/2/7/132712185/6916194.pdf
    • http://files.ptti.org/uploads/1/3/2/6/132695569/0f79de8284.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/4th_grade_math_word_problems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/46888714435.pdf
    • https://cdn.shopify.com/s/files/1/0437/1939/3448/files/devomositovesi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/drake_if_youre_reading_this_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/additive_inverse_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/zukuwali.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/kosalorufalin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/28901633027.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/soxuvovixivaxuduja.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/isaiah_berlin_four_essays_on_liberty.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/pufudagobomupaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/56010294964.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c1.bin
c17bf972607eb9595ffce960427ecc9436ed86abd03154cff199c0c184da46bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C1 5132 bytes
font_01_sfnt_off00006a4a.bin
166687f5dbe7ed781f623d8c5e273a71d35e4b7a8136cdeee5c943bcc2ac3eee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 10776 bytes
font_02_sfnt_off00008f38.bin
1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F38 16148 bytes
font_03_sfnt_off0000a431.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xA431 4324 bytes