Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0363abe3fa2d53…

MALICIOUS

PDF

46.8 KB Created: 2020-07-30 08:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c4333c94a77b0e15e414d08a4a4b88a SHA-1: 01271269b7400080a0dbbc29cf365de2872237ea SHA-256: 3d0363abe3fa2d537bcddbb775cca29dd303972e5d6fdae8842c11121b1f5f3c
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Uber business plan pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.com/pify?keyword=uber+business+plan+pdf
    • http://files.raniyoungdesign.com/uploads/1/3/1/4/131406337/3e979ccddb.pdf
    • http://files.samsleon.com/uploads/1/3/0/9/130969065/2207504.pdf
    • http://files.auntybencookie.com/uploads/1/3/1/8/131856356/manavixevevodiraju.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/lavewepugig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/82174321434.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/21302375475.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/2063468569.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/83272165107.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/xesigujamo.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/jifaxevituxunuzap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/59112293149.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/34902162656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40429789840.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/45991407514.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/23161883645.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/73292489778.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ab6.bin
d7766d54ac6286d41a55e528ce9ccf11263063eaa2092432be32c95038a0ead7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 4856 bytes
font_01_sfnt_off00008b33.bin
f2d6d3c6e9c2e1952bab96b559f9579860248c0a3155f3c19dac2008045b6bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B33 10276 bytes