Malicious PDF — malware analysis report

Static analysis result for SHA-256 410b92a515271da7…

MALICIOUS

PDF

62.4 KB Created: 2020-08-14 19:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca4863258b6feb17e0aa1138b3db4089 SHA-1: fa5ce85cd139fb970a17e5b097eedf649e87f1d3 SHA-256: 410b92a515271da76cd0a1d210d5fe519d7386f1802fd75b24f56f7c16a3668a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to 'Asus aimesh firmware', intended to trick the user into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious 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.com/pify?keyword=asus+aimesh+firmware
    • http://xekoraw.happaglowco.com/uploads/1/3/1/1/131164557/cd223.pdf
    • http://files.justleeds.com/uploads/1/3/1/0/131070149/fanazanix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/biwufafizizerebitasefom.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/odyssea_amabile_giusti_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/5819/0743/files/93288722528.pdf
    • https://cdn.shopify.com/s/files/1/0451/1229/5589/files/menschen_a1_2_arbeitsbuch_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/60833503609.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/lefavaxazuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/wefulofomugofolidozag.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/35916766041.pdf
    • https://cdn.shopify.com/s/files/1/0444/0568/6438/files/gta_san_andreas_cheats_pc_english_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a325.bin
9ebad5f006ecb41f270054d622c3431169b626867a2fcc6ae39996f1f4dcf2fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xA325 5056 bytes
font_01_sfnt_off0000b43f.bin
3448f169b0333d1d8d529262f485fe06998e541e53758d102891e933db741019
pdf-font-stream PDF embedded font (sfnt) at offset 0xB43F 10284 bytes
font_02_sfnt_off0000d7b2.bin
0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B2 16168 bytes