Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c53e9d787e9b70c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 17:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e66a940c0fcddac0d6b697381d68504f SHA-1: 33c3876c55ca8f77458b9a80305ed4cc99bad9d3 SHA-256: 4c53e9d787e9b70c54531f6b2a4d703e022d750af82e1823224e638d44a2427a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains the text 'what is millennials pdf' and the malicious URL. This suggests a phishing or scam attempt to redirect users to 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.cc/pify?keyword=what+is+millennials+pdf
    • http://files.technologytransferinnovation.com/uploads/1/3/2/3/132303382/madem-vuguzo-pedarinugasubo.pdf
    • http://files.keppelcoastcameraclub.com/uploads/1/3/2/6/132681536/kuzili.pdf
    • http://files.prayforrenewal.org/uploads/1/3/0/8/130814492/993d84788aa.pdf
    • http://files.extensionmatch.net/uploads/1/3/0/8/130874394/neromot-nuvizesi-fekona.pdf
    • http://files.cordescottage.com/uploads/1/3/1/4/131437619/3510e83dee.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/wekuvabawoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/kufawebe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/vaporugigeruzikiwidoxuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/tosuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/20302088877.pdf
    • https://cdn.shopify.com/s/files/1/0430/0315/0499/files/jixomiremokodutowema.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/73340968294.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/16479753018.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/html_tetris_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/besoxomikibelofinufetopub.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/fajifokiwiwelazidos.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_off00006a2d.bin
5484e3ac7ef907354627b2d5481d3b3f432e41d6555da076a392c17a80458127
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 5200 bytes
font_01_sfnt_off00007bc9.bin
62ebe2dfa7cca8756034574b15fea4b57cf629694daa6d86dcd7136aa85af223
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10052 bytes