Malicious PDF — malware analysis report

Static analysis result for SHA-256 1560e62d6d62906d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 22:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51fdb081562633bb455d7129f5d45dae SHA-1: 16434ddbd0ea8276179976bc0af50b520ecc086a SHA-256: 1560e62d6d62906d53feff152244a140e22ed68cbf126c8d35a2748f2bfb5d75
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.link'. It also exhibits a PDF link farm heuristic, indicating a large number of embedded links to other PDFs. The document body, though heavily obfuscated, contains the malicious URL. This suggests the file is designed to lure users to malicious sites, likely for phishing or malware delivery.

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.link/wix?keyword=to+question+synonym
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_111be8e04a0643abb911abb56fa8c3e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_993970a48f704fc4939cf0e755477601.pdf
    • https://static.usrfiles.com/ugd/b8c837_44efff5c5cb9483fa3f7557a02b30d8d.pdf
    • https://static.usrfiles.com/ugd/8acad3_3933fd8fd9a548bc9d5230cb8dcacd64.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/difference_between_aerobic_and_anaerobic_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/free_english_speaking_course_online_videos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/95094736795.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/malaleferisimajurupuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/44753381436.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/78140281797.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9063/files/order_of_eastern_star_paraphernalia.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/21485307582.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5148/files/elementary_number_theory_rosen_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0460/1777/3735/files/pathfinder_andoran_birthplace_of_freedom.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_off00005e09.bin
362d12f0d657e239a4b29b3afad2b5bb1037b8f3423aab0da1f37dacf1b5c0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E09 4552 bytes
font_01_sfnt_off00006d78.bin
64112f8e2c0e954f398a5644c390927f314b38dac2ce8091768ced7113b40539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D78 10044 bytes
font_02_sfnt_off00008f8c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8C 4324 bytes

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