Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbe1ab6f4268076…

MALICIOUS

PDF

39.0 KB Created: 2020-07-20 04:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d626a1e5a71945ce9d3ffc769c6df191 SHA-1: b43a9c71c38ebe122074e167fb0068ec1f18a59f SHA-256: abbe1ab6f42680765cc2e6235d405d903a14c5433247037c8db53d57d9981b64
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be garbled or truncated, but the presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious infrastructure, possibly for SEO abuse or to serve further malware.

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/wb?keyword=manuale%20digitale%20cd%20press%20clasa%207%20istorie
    • http://files.cyfairironmaidenslacrosse.org/uploads/1/3/0/7/130739883/ripejudunifudu.pdf
    • http://files.airoilandlead.com/uploads/1/3/1/8/131856285/7692927.pdf
    • http://files.thelastvilla.com/uploads/1/3/0/8/130813668/xamevet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5712/6295/files/pesimemewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5423/4785/files/8050108868.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/15494923984.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/88752286055.pdf
    • https://detomanuz.files.wordpress.com/2020/06/medukogez.pdf
    • https://modunopowo.files.wordpress.com/2020/06/zukujuxizowafabuxe.pdf
    • https://gijejipetig.files.wordpress.com/2020/07/33811492496.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/gevavujigalojixakupuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/64360537340.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/21618218053.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3183641906.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/19519658525.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/kilakaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/86813404630.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/78996656255.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://detomanuz.files.wordpress.com/2020/06/medukogez

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005873.bin
06ebcf2a4b80129fa5aee7ed2b66f9f21440252807443ddda0c9e2cc67b5ef6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5873 5208 bytes
font_01_sfnt_off00006a38.bin
ec89a7702edb48024cd0ccfed026ac3b9544165baed5946fda7b03b8656b7a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 10612 bytes

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