Malicious PDF — malware analysis report

Static analysis result for SHA-256 347bc3eb64255d5e…

MALICIOUS

PDF

41.2 KB Created: 2020-09-02 00:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee3b504d874d3a8bed1454d8b189a072 SHA-1: a7b5d681e8702ff25598a23aa6e41c815be04009 SHA-256: 347bc3eb64255d5e374bfc07d6f13590bcc8fb04c051f109643cdd7faead2f5a
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'prevention and control of water pollution' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm and a malicious redirector points to a content-based attack designed to drive traffic to a malicious destination.

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.ru/wix?keyword=prevention+and+control+of+water+pollution+pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/xt_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/gibefojenojokibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/fan_blade_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/zuxijubonej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/tufedifutogidadaxumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/majuwowukux.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fa69218529147fcae3f294073b34b4a.pdf
    • https://static.usrfiles.com/ugd/ed64d2_ada0732fcc344a9db8f0369d343ea0fd.pdf
    • https://static.usrfiles.com/ugd/fd3290_8a19f0eed1324cc4b55cbfb7854612f7.pdf
    • https://static.usrfiles.com/ugd/99b222_ebc0f680ab1245078fd316393a791f9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c0cb4a6acfd4ad98cf9c56e4c39bda3.pdf
    • https://static.usrfiles.com/ugd/5cd33b_b0f9b3b4a7fa4470a13b174717256d10.pdf
    • https://static.usrfiles.com/ugd/5cd33b_5ff44114125e4fe3a57f2bb7646e8523.pdf
    • https://static.usrfiles.com/ugd/3cb679_f1e4c7aac25343b6b90f40d457c771f0.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006218.bin
27449ac3ded7d01a70470c13cfe07588e016ef2327e494afdb26a9087158551a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 5124 bytes
font_01_sfnt_off000073b3.bin
d3f74f135aad02834c58e19b459d5d8bc571cf55c0a90a24ab44daaa4091150a
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 10668 bytes