Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b7c2425dbcd9ce…

MALICIOUS

PDF

35.3 KB Created: 2020-08-26 00:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182b073701fa19aadc8709f5c7ec3807 SHA-1: a44943be6b9bfe4e6ed4998aea5ed2d8410ccc8e SHA-256: 21b7c2425dbcd9ce7865620a66adc8b8f38728a1c6c5c8b235afa98c2a509ac6
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=dump+meals+buzzfeed. The document body contains garbled text but includes the same malicious URL, suggesting a lure to a malicious site. No scripts were extracted, but the extensive link farm points to a delivery mechanism for further malicious content.

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.com/pify?keyword=dump+meals+buzzfeed
    • http://files.transoceanographer.com/uploads/1/3/2/6/132680994/miwedoxuviraladefudu.pdf
    • http://vowupoj.mirrorimagedanceteam.com/uploads/1/3/1/3/131380213/terokano_mamevagiri_wuneluwuwuzikut_bizirijuwozeva.pdf
    • http://fuzet.piecedtogether.org/uploads/1/3/2/7/132740930/f8fff.pdf
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/89476229384.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/snakes_and_ladders_esl_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/gabriel_s_oboe_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/puntos_craneometricos_unam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/36757903771.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/chemistry_notes_for_class_12_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/game_bleach_vs_naruto_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/50666860607.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/53805868081.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/8807648664.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/95310073383.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/57207915668.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_off0000422e.bin
10e2b277a4f062d7d656a25e0a149d4c87b823a4ae3ab5f13ba92f19d7cee189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x422E 4820 bytes
font_01_sfnt_off00005298.bin
87c61f615e91e28ea4102e51c68f794a5569aa9f46ccb8d6718bc38a06ffdec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5298 9364 bytes
font_02_sfnt_off00007244.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.