Malicious PDF — malware analysis report

Static analysis result for SHA-256 5912b65267d8efd7…

MALICIOUS

PDF

57.7 KB Created: 2020-08-20 01:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8ad5ba0bbaf92e66a898dec3cf45998 SHA-1: 3f417047145099f2c9d828520dfa62b3c91569ee SHA-256: 5912b65267d8efd734896baac5e618f29a68a518b217a4bc3f9455f68bd39292
150 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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to malicious infrastructure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=certificate+format+for+internship+training
    • http://dobakemu.shawnsealer.com/uploads/1/3/2/6/132682093/xepen.pdf
    • http://files.visittbo.com/uploads/1/3/1/4/131437418/6422037.pdf
    • http://files.santarosaneighborhoodcoalition.com/uploads/1/3/1/4/131482952/a79d5f3c.pdf
    • http://files.darciebeemanblack.com/uploads/1/3/0/8/130814229/5c45c.pdf
    • http://files.summithilltopperfootball.com/uploads/1/3/1/4/131406736/9a3d8f4c0faf1.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/zezelodafawatidotuwan.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/pearson_anatomy_and_physiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/gastroparesis_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/katajexetumina.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/aruba_switching_fundamentals_for_mobility.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/gowigevamur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/47477707039.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/24798873912.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/28863193112.pdf
    • https://cdn.shopify.com/s/files/1/0454/2329/6680/files/ankush_raja_ka_bhojpuri_gana_video.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_off00009836.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9836 2828 bytes
font_01_sfnt_off0000a230.bin
3e5a78b3a7ae9ae37f20519b0d1c821bc295e627aea624230410111cbe6adb40
pdf-font-stream PDF embedded font (sfnt) at offset 0xA230 5304 bytes
font_02_sfnt_off0000b40c.bin
8d90774c0fd432b514e234102b74a304ebcd83973fdca0828345cc10aa15f773
pdf-font-stream PDF embedded font (sfnt) at offset 0xB40C 10200 bytes