Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbdaad8db9b00bb…

MALICIOUS

PDF

60.6 KB Created: 2020-08-13 03:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd5b6c3bb24d16df6b73b2d3721ce23b SHA-1: 26f9da88fc6af80abce92c6d2a3968b816743f21 SHA-256: 1fbdaad8db9b00bb447e2c79b7f8c0daa064fb34c9ba8e51772ad25d265e09ae
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=kadambari+pdf+free+download. Additionally, it exhibits a PDF link farm pattern, suggesting an attempt to manipulate search engine results for the term 'kadambari pdf free download'. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded URLs and the redirector link are sufficient to determine the malicious intent.

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=kadambari+pdf+free+download
    • http://femivol.kellicorneliaphotography.com/uploads/1/3/0/9/130969060/914569.pdf
    • http://files.sexyandhealthyshop.com/uploads/1/3/1/4/131483154/09f3c54cc.pdf
    • http://sofina.pyratellama.com/uploads/1/3/1/0/131070374/xenonalezeburi.pdf
    • http://files.stitchedforyall.com/uploads/1/3/1/4/131407164/segolerubofolodivi.pdf
    • http://files.egypta.org/uploads/1/3/1/4/131454581/lepirososof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/81754518924.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/watch_japanese_drama_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/revusatugasoxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/estudio_biblico_sobre_bautismo_en_agua.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/847024448.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/83802352409.pdf
    • https://cdn.shopify.com/s/files/1/0451/9349/4677/files/antimicrobial_therapy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/uniden_atlantis_250.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/carpal_tunnel_syndrome_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/storytown_grammar_practice_book_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/xijawuvuvanani.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/lojugutaduwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/zisotokesab.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_off0000a433.bin
daf4aa7af2e801febd9670ab7b0ec5274d1ac1a68a9764200402cd6f78d84f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA433 5208 bytes
font_01_sfnt_off0000b5ed.bin
525f39ee436fb36b0a5ec9255b89737dffecf21a042540dd912558f029d74886		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5ED 15064 bytes

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