Malicious PDF — malware analysis report

Static analysis result for SHA-256 b587c8601031c35c…

MALICIOUS

PDF

45.9 KB Created: 2020-08-20 12:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73f3e58f577093b646d18fbb08c1f7be SHA-1: fb7c485fc4e4930a48c1883f0f88c42193b76080 SHA-256: b587c8601031c35c97ce957005f9b07b03ca629ae188935ff1f9d51ee438a95f
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 'https://ttraff.com/pify?keyword=ammonium+formate+buffer+ph'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious redirector URL and several other PDF links. These elements strongly suggest the document's purpose is to redirect the user to malicious infrastructure.

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/pify?keyword=ammonium+formate+buffer+ph
    • http://files.keith-tealeaf-henley.com/uploads/1/3/1/8/131856356/gurejez_rodil.pdf
    • http://files.lucysugerman.com/uploads/1/3/1/8/131858975/kanowixe_nimalo_gajugun.pdf
    • http://mojomam.janetandrews.co.nz/uploads/1/3/0/8/130874493/seruwegebibanobi.pdf
    • http://files.nogodnofear.com/uploads/1/3/0/7/130775632/347a43910ad.pdf
    • http://vuvufelo.forrellco.com/uploads/1/3/1/3/131380005/zejesavagob_zujisagurazawiw_xakopiloda.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/amaterasu_formation_fairy_tail.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/manual_chiller_carrier_30hx.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/tabarazovilul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/24590829650.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/4580239626.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/14907970193.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/vunidawokijiwelaluvegur.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/monohybrid_genetics_problems_worksheet_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/22583174568.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/hallelujah_song_chords_piano.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_off00006946.bin
f5d2add37527bd4cbb45ff3a7b8e61381c3c664a7435289bf1c95a5cf41abfc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6946 4944 bytes
font_01_sfnt_off000079d9.bin
8de5319c18d6fc975395f007d48bbda8f873c2b2bcdc2d8cdd1f164b5bb48c22
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 10264 bytes
font_02_sfnt_off00009ce2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE2 4324 bytes