Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb502b74d448312…

MALICIOUS

PDF

44.7 KB Created: 2020-09-18 20:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56c3bd98495e09f716a2c0f9e1f2ba7 SHA-1: 6692fda65920d7d0eb533fc7a5d0546e6cae81a5 SHA-256: cbb502b74d44831269be0053bc40cb74d1eb4098b43f77e4295d19502460b2b9
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to obscure malicious destinations. One of the primary links, 'https://ttraff.me/pify?keyword=catching+fire+book', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the book 'Catching Fire' and the URL, suggesting a lure.

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.me/pify?keyword=catching+fire+book
    • https://cdn.shopify.com/s/files/1/0435/5899/4088/files/1154555047.pdf
    • https://cdn.shopify.com/s/files/1/0448/0113/0645/files/wings_birdy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4043/files/zowibodufikuvof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/collision_coalescence_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/jebavibasunisixuwoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/boxodemuwakiforeru.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/71197750630.pdf
    • https://cdn.shopify.com/s/files/1/0466/6454/8517/files/williams_textbook_of_obstetrics_free_download.pdf
    • https://9a5aa416-0237-41aa-becc-603e4506cbc2.filesusr.com/ugd/f59309_a28d84d281d34ad087f9ab72ee2fab65.pdf?index=true
    • https://e90705ca-aa99-4500-a55f-e5ab5727da4e.filesusr.com/ugd/49488e_7c2213989d8f429481a78b95af42c904.pdf?index=true
    • https://5bdcc7e9-33df-4dbd-a0c6-0d785a6a0c73.filesusr.com/ugd/1be480_e101b7b44e3f4460b0ab46d77a1a2782.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/basal_cell_carcinoma_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/xojigapaxekefivapirojok.pdf
    • https://cdn.shopify.com/s/files/1/0448/9661/6615/files/creative_cloud_no_credit_card.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/ssc_stenographer_grade_c_and_d_books.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_off000071cb.bin
cdce4e5943888ca7caf3fb4fb631f967e550e795c8ecdcd13ff72cdbfc97d00c
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 5040 bytes
font_01_sfnt_off000082f3.bin
f659d3f929944b138925dad0c27e01d81eb2da4c01485921c005240d5498602d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F3 10304 bytes