Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1919145b74e18e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 11:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995d3c762f12d7edd920d85c903bacd0 SHA-1: dd0450d18da8e18a1f9c8f5150c778ea2b67b726 SHA-256: 5b1919145b74e18e51c623cccbb12870eea446c27257966fb097612fb752fccc
154 Risk Score

Malware Insights

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

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 document body and embedded links suggest a lure to disguise malicious activity as a 'Cagr calculation excel template'. The presence of embedded URLs and the link farm heuristic indicate an attempt to distribute malicious content or redirect 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.me/wix?keyword=cagr+calculation+excel+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/68767332745.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/lapemawusejewezib.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/meloluba.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/73949988396.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/16307476423.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_60c52c18ac314ec1bd6534ddb8b469d5.pdf
    • https://static.usrfiles.com/ugd/696b8a_359257fa6065493993cb9c9e2ba2a53b.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/vatonanuroj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/dawogisexatafepite.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/2008_ford_fusion_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/behavioral_economics_introduction.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_off000056df.bin
4ac95ed84addf1c2b476f377efbc3f7bb291204cc855457faa0ee36d291717c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x56DF 5048 bytes
font_01_sfnt_off000067fe.bin
43d4afe616c8af5c2a598d346cef83e425dc75cc87de8935335947ef38c15a9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 13028 bytes