Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3c7e4d326d09f4…

MALICIOUS

PDF

54.5 KB Created: 2020-08-04 13:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f42e1e2d78554b121a5d98c35a9f98ca SHA-1: a82b7f54d23544c668d46bcb46aa420b08f9a611 SHA-256: ec3c7e4d326d09f4563200569d7ccd0c85bb9b5500ca0b380d722f9be9075789
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2583%25D8%25AA%25D8%25A7%25D8%25A8+bring+up+genius+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585+pdf, is flagged as a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with numerous links to external resources, including several on cdn.shopify.com. The ML classifier 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.ru/pify?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2583%25D8%25AA%25D8%25A7%25D8%25A8+bring+up+genius+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585+pdf
    • http://files.marthalindsell.com/uploads/1/3/0/8/130874593/xeduxepizigotibogoza.pdf
    • http://files.imandycole.com/uploads/1/3/1/1/131163747/jupewuju_dabigax_satabo.pdf
    • http://files.pact-ottawa.org/uploads/1/3/1/8/131857983/jotina.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/zusozasodagelojoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/47032072567.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/36660018984.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/kamuja.pdf
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/antineoplastic_drugs_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/talikusepelipebetoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofekofunore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/kigatolebeginemorogif.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/kozizevok.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/84523042311.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f70.bin
1c661383496f6a181fef81ea5630b0cefa87d0d5584881236e6069c10a041615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 5012 bytes
font_01_sfnt_off00007087.bin
1e54e1c6769d0e08d97ede188983b81ff38ee2227c433703e00a0853a7d809ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7087 10384 bytes
font_02_sfnt_off00009438.bin
15f2b94a14d28d12e42040588fc1866c1e5fe16368b39266b0500af48c531cb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 17632 bytes
font_03_sfnt_off0000ae37.bin
a83012344a506a05e8c2b9c30e27e839400d80ab667ca3e42133b9148b380f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE37 18020 bytes

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