Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfedf63f5e36f8e1…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 17:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d96d8b5ef98c825c8eefa4fc626cedb SHA-1: de57a333fbfba4f2c1f38cea26de153b584bd159 SHA-256: dfedf63f5e36f8e15f4a6ca66c2ef5e56c8cae56c75d2c8c5afebb376c969097
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, designed to create a link farm for SEO poisoning. One prominent link, 'https://ttraff.cc/wb?keyword=aspen%20plus%20book%20pdf', redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the lure text 'Aspen plus book pdf' and the malicious URL, reinforcing the attack pattern.

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.cc/wb?keyword=aspen%20plus%20book%20pdf
    • http://jibadafaj.stephenwitkin.com/uploads/1/3/2/3/132302780/wuzode_fefojopix.pdf
    • http://files.iopenminds.net/uploads/1/3/1/4/131438759/magabolufivevu_tumikidavanenut.pdf
    • http://files.atlanticmusictherapy.com/uploads/1/3/1/3/131380469/86b118574576.pdf
    • http://files.paddyharrop.org/uploads/1/3/1/4/131453312/zenoxotepesaxox-gobokalofok-fuzuwerevig.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/xemufu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/podetevinegadidufagakuzu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/dulakapagigurad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6194/4228/files/wanuvapa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/49806011096.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/1767918275.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/86473094797.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/free_discord_members.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/27284160731.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/siretavopawim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/nopalavofo.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_off0000576a.bin
e917ce7b687ce110dc47bd07d1e64753f7bddc41b1e7fa485219e213f8a686a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576A 4920 bytes
font_01_sfnt_off00006836.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 2116 bytes
font_02_sfnt_off00007200.bin
22230cceb92671fa05b2efaded14f4d7fdedb7a8bc490285444ef06a92c8309d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 15320 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.