Malicious PDF — malware analysis report

Static analysis result for SHA-256 79478a85355562ba…

MALICIOUS

PDF

35.1 KB Created: 2020-08-31 03:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffcb6a2c9042f23e722acedc32190f08 SHA-1: 1cd7513614ed072d8c24d20680177256059525f9 SHA-256: 79478a85355562baa000b8059e6770e73466d1c5ab578356f6dafafef6c20b58
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for a photo editor download, which is a common tactic for phishing or malware distribution. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to drive traffic to potentially harmful sites.

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/wix?keyword=cut+and+paste+photo+editor+free+down
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b7182_6f5fe1febe084722bc1b48276ef0b842.pdf
    • https://static.usrfiles.com/ugd/fe83c3_dc54bd0a79674f38b40312e478fcedd1.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_0ef4909695464b0ca517ba12087376da.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/android_customtabs_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/59313643771.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/51869774330.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/fulivejasonuwulosodarug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/tolad.pdf
    • https://cdn.shopify.com/s/files/1/0456/9815/4652/files/buvoxifabapemizexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/just_one_night_gayle_forman.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ff7f1d9d89e4e2789087cad1ca41012.pdf
    • https://static.usrfiles.com/ugd/3bf302_f5663b9fd70e4f69a762ad2c687537be.pdf
    • https://static.usrfiles.com/ugd/a59130_20cb43cead2d4c2aa8694367cc9b6cfd.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8e17c51a82a9448aabcfe7be7abc3b71.pdf
    • https://static.usrfiles.com/ugd/b8c837_f601a48014ad4ce6a86afe8b1550cd5c.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_off00004d45.bin
71d15aa2a40d62cc4e27a0de19fd035890581bb660a9c2df281444a42470c6cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D45 5092 bytes
font_01_sfnt_off00005e9e.bin
10da40cc8185339113b3f0c3f25a0b5aa1f13f173b59545e536b6da61c56e094
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9E 9628 bytes