Malicious PDF — malware analysis report

Static analysis result for SHA-256 619cf14f0e92a458…

MALICIOUS

PDF

50.6 KB Created: 2020-08-01 19:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 667b02538916b23e5fbf6d6f53fd24a9 SHA-1: 72e6a2833763bc732f3c97ee99cc897d9fbdd218 SHA-256: 619cf14f0e92a4587ca7d938a70cbb4ca2e9a8066fb71a38ce0a39c481189adc
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for "Steven Universe episodes". The link, https://ttraff.com/pify?keyword=steven+universe+episodes+download, leads to known malicious infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to appear more legitimate. No scripts were extracted, but the presence of a malicious redirector and the link farm strongly indicate a phishing or scam attempt.

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=steven+universe+episodes+download
    • http://files.iowabackyardfarmer.org/uploads/1/3/1/3/131379743/milakoserebibex.pdf
    • http://files.massnie.com/uploads/1/3/0/9/130969472/824117.pdf
    • http://files.christinesjourneys.com/uploads/1/3/0/7/130738939/9904901.pdf
    • http://files.andrewpeterson.net/uploads/1/3/1/4/131452858/ca3c49983db7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/34324962613.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/79026614615.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/52888216922.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/dilubepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62386903812.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/45567753326.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/67512250408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/30492579637.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/82021448027.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/menabogamaritalorovikuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/82971954621.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061af.bin
54b28e5199fd61e845d95d3694485e4da423017681c7bbf676178e8178c269e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 5208 bytes
font_01_sfnt_off0000737c.bin
3f3e275ef91bb8757d008c57093fc49d0d5af3f7792a9c3831ddf2b6ba10df3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 2352 bytes
font_02_sfnt_off00007de1.bin
5d283664487d4deb2c829ecc609092de0fe140f467a3a9da8fd3de73fec339e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 11504 bytes
font_03_sfnt_off0000a521.bin
8270c7060eb8214802755ee3d4f4b4a9bfc0c02c03f0f13361e9dae8be90725e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA521 16872 bytes

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