Malicious PDF — malware analysis report

Static analysis result for SHA-256 1257801356041c0b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-15 02:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b10e38814c7bb4382baf661372cc16da SHA-1: f0e2b2b156fe60dae7ea0cc45185349765a541e5 SHA-256: 1257801356041c0b1cb4c0a73ca0df43b5b3f758771233391300a20df9000280
170 Risk Score

Malware Insights

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

The PDF contains a lure related to a "Scotiabank pre authorized debit form pdf" and includes a critical heuristic firing for a malicious redirector link. The embedded URL points to a redirector that likely leads to a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=scotiabank%20pre%20authorized%20debit%20form%20pdf
    • http://files.bgcwestal.org/uploads/1/3/2/6/132682851/lisutujuvefasebot.pdf
    • http://jogas.christmasinchilhowie.com/uploads/1/3/0/8/130873851/3496568.pdf
    • http://files.cassieabate.com/uploads/1/3/1/4/131409090/8744195.pdf
    • http://files.thepitchthemovie.com/uploads/1/3/2/6/132695662/5783587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/8501218638.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/61619448255.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/kuzogiwejotelewunagirar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6094/5305/files/77741122004.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/fitnessanywhere._com_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9876/5480/files/gokibalizadusumu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bea.bin
e79507190ec13793f2fd8a7f5f108c968fe31b540c22d549135ccf721676f5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEA 5424 bytes
font_01_sfnt_off00005e23.bin
1ca02f345eca837eeabcda5bd89a25162780dd8cd088a168b73735e847f392fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 9528 bytes
font_02_sfnt_off00007eac.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 4324 bytes

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