Malicious PDF — malware analysis report

Static analysis result for SHA-256 01510d70b1c38a6e…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 11:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a54b7adea7aadf2595bccb017c8bae19 SHA-1: bae694d08ba9d735a27464371f9d17f1802ef277 SHA-256: 01510d70b1c38a6ee2968b3f4682305c40e0a711cf95909cfaeb43e86b4f3fe8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=inductores%20enzimaticos%20pdf'. The document body also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this 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.cc/wb?keyword=inductores%20enzimaticos%20pdf
    • http://files.dreamgirlpublishing.com/uploads/1/3/0/8/130814245/814150.pdf
    • http://files.abundantlifemedical.com/uploads/1/3/0/7/130775922/75322d927264c15.pdf
    • http://nepixu.lissyraine.com/uploads/1/3/1/1/131163635/f83b50bf.pdf
    • http://files.themathsguy.com/uploads/1/3/0/7/130775413/6b87369220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/algebra_and_trigonometry_structure_and_method_book_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/guvufedam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/18194727036.pdf
    • https://cdn.shopify.com/s/files/1/0428/2974/2246/files/adding_fractions_coloring_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/zikogigawaxaziwinedogar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/gender_barriers_to_communication.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/81544683416.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/sekotunenipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/besexiwesapemalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006106.bin
fc7573c975505e199c075bd1e141150bf994c31df9aaa3cbe961c075cd53773b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5140 bytes
font_01_sfnt_off00007261.bin
31324b638fbdc04f6440eca0c9aec21d94e63045cc21c2a69aa9166342e2d2b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 11296 bytes
font_02_sfnt_off00009731.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9731 4324 bytes