Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc95e48455b56a4…

MALICIOUS

PDF

50.4 KB Created: 2020-08-04 16:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cedf0a803f4f0311bf945d2a7fd5613f SHA-1: b5a7cfd2eaf6aaf0757156818357a1a851d8db32 SHA-256: 5cc95e48455b56a44d87383cf594a6ddef71435f3d2a42819bb58bc70fb8aa32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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.ru/pify?keyword=statis+pro+baseball+rules+pdf
    • http://kafujisu.leviteministry.com/uploads/1/3/0/7/130738970/61ff5f3f80.pdf
    • http://files.airmunc.org/uploads/1/3/1/3/131383661/2378620.pdf
    • http://files.joedreher.com/uploads/1/3/2/6/132681836/8e50370.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7182/3267/files/21845257821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/tinkers_construct_holy.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/pifegulukaxatezobi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/mikodi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4971/9720/files/jquery_reload_page.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/typeracer_auto_typer.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/armour_hot_dog_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/26868738326.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/entrepreneurship_theory_and_practice_raj_shankar.pdf
    • https://cdn.shopify.com/s/files/1/0433/1343/0686/files/21649593911.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008706.bin
754688244866adf10cc2c60afedad79f78ca705705a64ee8da5e5969e731b518
pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5280 bytes
font_01_sfnt_off000098fc.bin
46f0ced90e6de32ec44ffce8448b7744bc9b3612baf6290860a865df23c623d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x98FC 10384 bytes