Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc37c60416f57d9…

MALICIOUS

PDF

38.2 KB Created: 2020-08-31 05:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ef64ff137a7bb9810a3de374856425 SHA-1: 9b19ec589c55c50afaea621c1aa08208fee866d7 SHA-256: 5cc37c60416f57d946377aac7aca8d6bae2de5a190d1b647acc10c907ffca462
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'hunter x hunter dubbed torrent' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farm abuse.

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.me/wix?keyword=hunter+x+hunter+dubbed+torrent
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/72702887959.pdf
    • https://cdn.shopify.com/s/files/1/0443/9543/0054/files/34093750822.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/cebu_map_with_tourist_spots.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/saints_row_3_pc_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0435/0171/5622/files/inorganic_chemistry_solutions_manual.pdf
    • https://static.usrfiles.com/ugd/cf79db_fca864f8208c4ddfbe160577b60f4cdc.pdf
    • https://static.usrfiles.com/ugd/9f6a24_87bc809edf8b4bc7a45dd482c254221c.pdf
    • https://static.usrfiles.com/ugd/77941b_94cfe3c0cb364a78a9d07d7136359fdb.pdf
    • https://static.usrfiles.com/ugd/eed56f_ff77ae05fec8470494844a23a9996df8.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4693/files/maus_book_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/1867/4330/files/mcgraw_hill_connect_chapter_3_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/mexaj.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_off00004b68.bin
ff88d582b0896a50841fda7ff2a5ef74f185d3af81c7c131dbe820ae4d1d054a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B68 4496 bytes
font_01_sfnt_off00005a95.bin
2d43742353bf003ad6aa9ea2cce6244c3bcd867e4abd5312f23b3a27996fd6a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A95 10500 bytes
font_02_sfnt_off00007e3c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 4324 bytes