Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5daa5e85a587a3…

MALICIOUS

PDF

40.1 KB Created: 2020-08-24 01:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d38b3681130005801f99155159f0131d SHA-1: 3050f6eb85e52d74b597cf87e817399f6f2429e4 SHA-256: 6a5daa5e85a587a3b7b6c72fef871c65f4c0dfdd89eb31c83efcbf56d442628f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=complete+auxiliary+view+pdf', which is a known malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the embedded links are sufficient to indicate a malicious redirection 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.cc/pify?keyword=complete+auxiliary+view+pdf
    • http://files.ronsgameroom.com/uploads/1/3/0/9/130969489/81e4bf99c52a56.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/mentoring_minds_math_level_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/74117572826.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/canon_t70_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/89768046676.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/nuredokaxobegaxaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/44457667818.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/gizelub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/xenuvoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/rolivuwovebur.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/short_history_of_english_literature.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_off0000539e.bin
750be177854e6b4f347491aa083d763c58a1046296b6b9ac274601732f09e4ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x539E 5128 bytes
font_01_sfnt_off00006537.bin
45d1ab491291db2fc1e1ba728442baca67badeb816a2c3f9fa7cdf8e84ac5b58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 9540 bytes
font_02_sfnt_off000085ba.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BA 4324 bytes

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