Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdda8a0805d6827…

MALICIOUS

PDF

37.7 KB Created: 2020-08-30 18:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dcad5a7fe959feee05ab64ece0e20d5 SHA-1: 3b67556726a5960d037ff77ce65066f0fca68197 SHA-256: afdda8a0805d6827df02bc5ff9c0bd0315e11a0d98d547e056525ef682fd7b42
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=let+reviewer+prof+ed', is flagged as malicious. The document body is heavily obfuscated but contains this URL, suggesting the primary purpose is to redirect users to potentially harmful content. No scripts were extracted, limiting further analysis of the payload.

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.cc/wix?keyword=let+reviewer+prof+ed
    • https://cdn.shopify.com/s/files/1/0441/0854/6200/files/how_to_update_nexus_7_to_marshmallow.pdf
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/mother_s_day_coupon_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/jitibadasegidafazidoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9445/files/kipatijunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/31853916510.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/border_song_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/37291628428.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0906/files/ascending_and_descending_order_worksheets_for_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/vupakezufaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_005882a4fa324a5691640cd1ef84b234.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc22890e19354a8c95a814f9dc2f3ac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f1da4ce6619429eb17f13416e33ad5a.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_off00005643.bin
7e93dfcd50ec92ca51e15ff10e11a5f48a3c597ab1e3c22463d8d48844aca81d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5643 4708 bytes
font_01_sfnt_off00006674.bin
04b65850dfed40706ce0ba72ea27d0434f915fbff2b06a4fa024fc19792dab84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 10436 bytes

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