Malicious PDF — malware analysis report

Static analysis result for SHA-256 8910a10719966817…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 17:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55762038ba0aa718d0f5316ea1972fdb SHA-1: 62bb65147847c67ee6f664bc70f460f8ca49a68e SHA-256: 8910a1071996681719985681188351918e13ff746599e25791ce5d99c6c50e38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One URL, 'https://ttraff.cc/pify?keyword=atharva+veda+in+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=atharva+veda+in+pdf
    • http://files.casalebenedetti.com/uploads/1/3/1/3/131379099/zizekoxagazala.pdf
    • http://files.shop.bushnvinefarm.com/uploads/1/3/1/0/131069812/9458d295b.pdf
    • http://files.studiogoodwinsturges.com/uploads/1/3/0/7/130738850/wogazejo.pdf
    • http://jutunufux.jelopez-stage.com/uploads/1/3/0/7/130776542/5ece06f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/atomic_orbitals_and_molecular_orbitals.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/5157540778.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/garewapiveragidovebopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/buvofukosatibikesas.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/organization_of_shoot_apical_meristem.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/jasuxuwudatezutadiguw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/sibogigelenevesanefuvijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/97625390126.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/les_accords_de_guitare_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/magemuzekonaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/port_open_check.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/champion_3500_watt_generator_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000700b.bin
f26c6ea0409da1321c2d64cb99097f095c4e367c4eabcaff5fb3017d3b2a1cf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 4968 bytes
font_01_sfnt_off000080f8.bin
dbc00a2c0aab2d624f5386cc47b7c04ebc28b65f819fd51d0cb9246518423c48
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F8 10700 bytes