Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce217713b324fc6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 03:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32939bf9af35f792c2d8b77508036da9 SHA-1: dbb08e2aaca456d94b43865c1bd3ccb3bb6a844d SHA-256: 0ce217713b324fc6f1e4d39d69e0b02d5e9b3c5103ebd5a7f87849ca4f419552
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users into clicking it. 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.me/wix?keyword=osrs+pure+guide+quests
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/accrued_expenses_balance_sheet_account.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/70486014512.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/96655956508.pdf
    • https://cdn.shopify.com/s/files/1/0428/9321/3852/files/72654212962.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/macarthur_bob_ong.pdf
    • https://cdn.shopify.com/s/files/1/0451/2422/3141/files/anatomia_del_cerebro_humano.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/6005214703.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_6feda8f8e7064985b395ce0b919a9c2c.pdf
    • https://static.usrfiles.com/ugd/9a242c_14f446fc391c4db8a36a85da4ff5600e.pdf
    • https://static.usrfiles.com/ugd/738632_4372702b0abc420ba2e51767b8ceb913.pdf
    • https://static.usrfiles.com/ugd/c20ea7_4238bd1a1d8a4117b6aba3503987d53f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c1f3fb7df974c00b7f3a8f0f9b5b514.pdf
    • https://static.usrfiles.com/ugd/01e791_3ee5b5559ad44f89a46d0ca1f1b7e1d5.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_off00006387.bin
945753e61a64d8afaf84c558c3ef038645ebd37f1ac730f40607bc2fe618a64e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 5040 bytes
font_01_sfnt_off000074b1.bin
4e144f9c849669833a5db6ea4e5ab732ca73d73ec810a985846e87c32c8311a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B1 10020 bytes