Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e2b6900e69d558…

MALICIOUS

PDF

39.6 KB Created: 2020-09-05 19:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ede65d6749cf75299c9e8b6d863d768 SHA-1: 256b8fff58fc2dbf167c3e04303ac1242e1e42a4 SHA-256: 36e2b6900e69d558f6d5b204f512f4b95e2f7a7e7bf46ee7c744db794e43b2c7
130 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to exam forms. The presence of a visual download button further supports a social engineering attack pattern.

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.club/wix?keyword=cbse+improvement+exam+form+last+date
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/23098587013.pdf
    • https://cdn.shopify.com/s/files/1/0431/3491/0618/files/rosa_rosae_rosam.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6458/files/beginner_s_guide_to_sculpting_characters_in_clay.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/face_shop_green_tea_sheet_mask_review.pdf
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/behavioral_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/40th_bcs_preliminary_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/77140253636.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/reliability_and_life_testing.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/vunij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/ap_polycet_previous_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/xopamufivovanas.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/reading_ielts_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be0.bin
000ed7cc53060a82122b0d9c0955d1e5e0554e3e3e7df5b348197ce7f4d79314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE0 5360 bytes
font_01_sfnt_off00006dfe.bin
bca5c3a21657424961a16cb25d0b232b03a4bbb4939c65da7bcfe3cb0cbc322b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFE 10628 bytes

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