Malicious PDF — malware analysis report

Static analysis result for SHA-256 63bed7f6718b5e4f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-28 14:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1d240a7fc654a9061f03ab381a576cc SHA-1: 7d399bcfe14156f567b2370313d59e8270411d1f SHA-256: 63bed7f6718b5e4f7bf0d153ce93ca302cae833b45a67ad642c73a7ee5278c5b
154 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link disguised as a song download, aiming to lure users to external content. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further payloads. While no scripts were directly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an intent to redirect users to malicious sites or download further malware.

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=everynight+in+my+dreams+titanic+song+free+download
    • http://files.kingfisherwellbeing.com/uploads/1/3/1/6/131636872/vofel.pdf
    • http://files.lightdocumentary.com/uploads/1/3/0/7/130740112/kafabox-tesepo.pdf
    • http://files.ukaydeoro.com/uploads/1/3/0/7/130738892/1145243.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/mafaxama.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/tinofimufejanad.pdf
    • https://cdn.shopify.com/s/files/1/0428/8993/7055/files/wbs_file_extension.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/62221358808.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/52781235033.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/antibiotic_sensitivity_test_kirby_bauer_method.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/71244393934.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/9311000623.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/5827694907.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008ba0.bin
a4764c5f8d33540d181a4595feedaf5944a7727a792ecda13ccf222f2d75c184		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8BA0 23820 bytes
font_00_sfnt_off00004e87.bin
215a4138012b34860381d105e7107c9fd70491a9b455f2a0b0bc56d32706849d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E87 5644 bytes
font_01_sfnt_off000061a4.bin
b0c885fead262319f06cd9b33b854b12e3e6b8eff1e6b2ec71bae7d539bc69e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 13296 bytes

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