Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dda9c4c4f1634fa…

MALICIOUS

PDF

52.3 KB Created: 2020-07-25 11:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f6923ab3ef9a4ebfaba28ebe0d0297d SHA-1: 4d4f2a1075414eefbe3af94e92cfb0a1c7affda5 SHA-256: 4dda9c4c4f1634faeb779168fd85dea62bfe9eff7c51a9cbf6554b8fd2609610
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of a malicious redirector and a link farm strongly suggests a phishing or malware distribution attempt.

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/pify?keyword=pip+selfie+camera+photo+editor+free
    • http://files.trahk.org/uploads/1/3/0/9/130969220/51ab9fb2.pdf
    • http://files.newkitchensplus.net/uploads/1/3/0/9/130969545/bazekezi-vavotibevivaz-motake-rowurur.pdf
    • http://files.impetusanimaltraining.com/uploads/1/3/0/7/130775983/13058d.pdf
    • http://files.mansfieldvethealthcenter.com/uploads/1/3/0/7/130775561/jorefozoziteko-zomotuluzamum.pdf
    • http://files.ientt.com/uploads/1/3/1/3/131398605/3afa00.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxasukazojolivuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1018/files/varuposelugaxibirutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/tujofelijukenudukal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/ninorukunupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/titamiwagifukagewizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/92803603468.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/gogonibidabix.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/wulapukaravabo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/6207394827.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8215/files/94232039393.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ecd.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 2952 bytes
font_01_sfnt_off0000795b.bin
31a6379e8a6e2b87985fa0813df87d12bf61e57a9972a09b7dbc773d83776665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795B 5076 bytes
font_02_sfnt_off00008a91.bin
c4dff6e25db854621e8ab7a4f10657dbac8bc112384f9b155532660630c22a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 10196 bytes
font_03_sfnt_off0000ad95.bin
1873fa7a539ff00c8c1392723f18eb1e977adbfda941d447d459c5f21b93b389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD95 16204 bytes

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