Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b30c3412fa80467…

MALICIOUS

PDF

37.3 KB Created: 2020-08-29 19:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f12e888c862c3cf56616d5475c7f351d SHA-1: 7f8d80f14f050ae9795cebbd8d7eea027682b824 SHA-256: 2b30c3412fa80467337d4dc03de0bdf9ee8586837a3ba230eb79d9cdf76adb53
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one prominent link pointing to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text that appears to be a search query for a file download, suggesting a lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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=dbz+bt3+iso+file+download
    • https://cdn.shopify.com/s/files/1/0437/3744/8609/files/wkhtmltopdf_page_break_inside_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/magusikavagegufiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/28104499940.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/gadafurevadoleko.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/pivexet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/anrede_englisch_formal_letter.pdf
    • https://static.usrfiles.com/ugd/8cbfce_799494100fe84c54a1b743611a7ba762.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4364686319d4179aea7819f94929b5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb3eb61edca246e3b90a5ce8c2c487bd.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/adobe_acrobat_xi_standard_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4700/files/nupiwewunevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/gunakenosiladadufegigo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5964/9429/files/periodic_table_of_elements_2018.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005353.bin
4d20a7a9952e797471b000459622e20a4492f4b46831b3e2ad191baecf8371aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5353 5248 bytes
font_01_sfnt_off00006558.bin
f6f8e2f4fefdf17e4b6b00221add008581b85e4609352ae69d299e35fd992e46
pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 10240 bytes