Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a2d53bb5c8b3d9…

MALICIOUS

PDF

55.8 KB Created: 2020-11-02 20:21:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a18eb84280cdb6d8e6ac396776123a2 SHA-1: ba8c88616f30487a96e2582ae5540d3315b45834 SHA-256: b2a2d53bb5c8b3d93ef0372baebd5eadfa96adb20ddcc29a952c96e303438082
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically at the URL https://ttraff.me/123?keyword=black+labrador+puppies+for+sale+in+michigan. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, some of which are benign but others are unknown. The document body, though heavily obfuscated, contains the same malicious URL and benign links, suggesting a deceptive lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/123?keyword=black+labrador+puppies+for+sale+in+michigan
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/wegigozupesukobisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b10ab33-e07b-4726-85cf-7e032938cee3/41150163856.pdf
    • https://uploads.strikinglycdn.com/files/317dec67-dc8d-441d-9ef7-e7f96f795e50/sijuwixefabigajutifabowuk.pdf
    • https://cdn.shopify.com/s/files/1/0487/0809/2054/files/26584764793.pdf
    • https://uploads.strikinglycdn.com/files/dcbeb975-1b0e-4e31-bc0f-db0229c4ed61/jovaxokolototowidaxader.pdf
    • https://cdn.shopify.com/s/files/1/0504/7835/0531/files/what_is_a_pdu_networking.pdf
    • https://uploads.strikinglycdn.com/files/ac4d8ffe-c316-4941-990e-cd4448c2bdf1/josasokosumusagulomuk.pdf
    • https://cdn.shopify.com/s/files/1/0505/0898/8588/files/nova_launcher_prime_apk_gratis.pdf
    • https://uploads.strikinglycdn.com/files/f0199f5a-2da0-4dc7-a46b-4cc1b584cf75/canciones_d_barney.pdf
    • https://cdn.shopify.com/s/files/1/0268/8496/4539/files/worgen_leveling_guide.pdf
    • https://uploads.strikinglycdn.com/files/c38db3cb-56e9-4442-b794-f388d82530f2/tazisabazixekidupakofuj.pdf
    • https://uploads.strikinglycdn.com/files/370cf02e-3188-4092-b0c1-f38375d539b1/star_wars_battlefront_2_cd_key_gener.pdf
    • https://uploads.strikinglycdn.com/files/dbb7b655-a7af-424d-a4b6-cee9b3970a50/42931777037.pdf
    • https://cdn.shopify.com/s/files/1/0435/3130/5112/files/disney_magic_kingdoms_apk_mod_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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008232.bin
fc2c1c67d3e4c54a362f873dc2a90427bb0c49bcf66fd4998eb5bbb4795de46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 5820 bytes
font_01_sfnt_off000095db.bin
05e3989c09c1c503aac517acd85ce79ba9103871464efa027edb2dfcccce34ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 11580 bytes
font_02_sfnt_off0000bd2d.bin
271a2e063496e2c4cca37b0de2c67913adc99ef93bccf7d4450a7a441f6150a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2D 16136 bytes

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