Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2b0874c3c723d2…

MALICIOUS

PDF

42.6 KB Created: 2020-07-31 01:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9cf0b79be69770adb2d3118de2bc1e9 SHA-1: 306fdb1ef2818d8c7ed5d5ad12305c22104453e3 SHA-256: 5e2b0874c3c723d2f04976302c8f5b38e1e61c0aa4180f3c52816b4135b429e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a catalogue lure, which is a common tactic for phishing or directing users to malicious sites.

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=schneider+mccb+catalogue+pdf
    • http://files.wjra.net/uploads/1/3/1/0/131070527/vogadutiwovazin-guxoxuse-tegivoxafarat-xomuxaki.pdf
    • http://files.widhalmcustomhomes.com/uploads/1/3/1/4/131438847/vobodazub-rofudoj-sakureni-figuraf.pdf
    • http://files.straightoutscribes.com/uploads/1/3/0/8/130814393/lubominuxobitetasig.pdf
    • http://files.marielupia.com/uploads/1/3/1/4/131409677/b0bff61a4.pdf
    • http://files.mollymarrinbasketball.com/uploads/1/3/1/8/131857540/fozofogixazawikuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/80592935294.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/petij.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/zudoxobox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/65254001098.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/56169863375.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/masirekobana.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/vebuzamugukaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/97894125303.pdf
    • https://cdn.shopify.com/s/files/1/0432/4045/6360/files/43077271861.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/27305602884.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/79692601624.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/kisuwavib.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_off000067e1.bin
5ffb7539efa6142157f5bec36c7a8c3fee740e42c5f01f4554c6059ef37e2649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 5516 bytes
font_01_sfnt_off00007a5b.bin
45c302875cc26fdbff60b98a33354652ecdc3dacfabe978fa4d1d25ecff27a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 10284 bytes

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