Malicious PDF — malware analysis report

Static analysis result for SHA-256 87197ae9baae5900…

MALICIOUS

PDF

48.0 KB Created: 2020-09-02 10:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc90b95562a873f155e0c0e63a806c7f SHA-1: 3ae19831ea90a28765d16e824995706ffdd28af4 SHA-256: 87197ae9baae59004bffa55ea04293fb8b38f5a0eb75b8d779e664d67515c6f1
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link redirects to a malicious URL, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=muslim+baby+name+with+bangla+meaning+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/dreamweaver_cs3_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/bipumiduligomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdf
    • https://static.usrfiles.com/ugd/37321e_d2b6b4ee29124298a8dd7542a13a112a.pdf
    • https://static.usrfiles.com/ugd/f65518_9e2f5950b60e40e4a842cfa9d73d606a.pdf
    • https://static.usrfiles.com/ugd/b28561_6a7707802ecd4836aa1b1765602e84c5.pdf
    • https://static.usrfiles.com/ugd/04e6f9_40093b6cdd4f44659bcab4effba809c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6278de3aced47b392352203358036d6.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/wagaparajusipapaliz.pdf
    • https://cdn.shopify.com/s/files/1/0462/1854/3258/files/dogaxunujozip.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/hypixel_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0465/1633/8838/files/98752770395.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006789.bin
864c2ef966c5a4096e9f59429eee4cefe0203c0e3df1b15c2b492b3c80be582f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6789 5700 bytes
font_01_sfnt_off00007ae4.bin
99ec4c34149cafeb15da1e48dc411c4bde989a17699209c032187059788b6bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 6128 bytes
font_02_sfnt_off00008ed6.bin
c14e2f7da125ef8b3b25fd3e24b063d4a916daf24bcaebe20e3d9112efb0c76a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED6 10000 bytes