Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f304139ea7ecd8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 07:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018556cd13e4fcac294f42836479c6fe SHA-1: 4c86bab45177cd7fb663bd02bd1cb62ca21e71f7 SHA-256: 62f304139ea7ecd8f6f4c6666caa83e8ab0ea151eda5fc21094cf74991979149
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with text related to song lyrics. This suggests a social engineering tactic to trick users into visiting a potentially harmful site. The presence of numerous other links, many pointing to PDF files on Shopify, indicates a link farm or SEO poisoning attempt, likely to obscure the malicious redirector. No scripts were extracted, but the ML classifier strongly flagged the PDF as malicious.

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/pify?keyword=we%2527+re+going+to+be+friends+lyrics
    • http://files.eastsideyoga.co.uk/uploads/1/3/1/3/131381772/1025680.pdf
    • http://files.sugartrampoline.co.uk/uploads/1/3/0/7/130776263/sezinakovej_rasumojexavad.pdf
    • http://files.coastal-graphics.com.au/uploads/1/3/2/3/132302963/lidomoxipalituvekuxa.pdf
    • http://files.downbeachhockey.com/uploads/1/3/0/7/130738568/bixapug_wefowejusupit_lodofer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/john_deere_la140.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/23268542234.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66923604261.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/95621752950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/plants_vs_zombies_minecraft_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/15680402648.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/womululazamakopadin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/vomefejakosodakuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/34137022603.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/56949202458.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_off000063dc.bin
9075a63436d76eb2e4c3ebab86e742905e88341682c45bb3ba7116fa225f8290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 5268 bytes
font_01_sfnt_off000075fd.bin
3ea6454a4d2acad133b79858522cdb1cb079ac144972ae588a57178f26112023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 10392 bytes

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