Malicious PDF — malware analysis report

Static analysis result for SHA-256 536e19eef9902599…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 15:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd81ed8d4d9041fd8af6d3f865639973 SHA-1: f520789e121c396ae03e30e9b0e9274fca4165ca SHA-256: 536e19eef9902599dc17b5eb1b95d014c240f64898f6273249098989aa9944f8
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 one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Eclipse juno java 8' and 'wkhtmltopdf', suggesting a lure or context for the malicious links. The primary attack pattern involves directing users to external resources, likely for further exploitation or phishing. The presence of numerous Shopify-hosted PDF links indicates a potential link farm strategy.

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=eclipse+juno+java+8
    • http://files.hollyspoodles.com/uploads/1/3/2/6/132695455/lejekenogefa-zusonadijo-bigizexisijod-penomuk.pdf
    • http://files.yingyanzhao.com/uploads/1/3/1/4/131453902/vitesiga.pdf
    • http://dajuferi.beechwoodtrue.com/uploads/1/3/1/1/131164250/1aadcc6679795ce.pdf
    • http://pevazibin.lcandlepress.com/uploads/1/3/0/7/130776082/deserivum-vajikijirixa.pdf
    • http://pabif.tahoportfolio.com/uploads/1/3/2/6/132695584/6caf861a6a6f.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7645/files/ekurhuleni_bursary_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/zinel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/65055795294.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/quality_assurance_and_voluntary_accreditation.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/nexuderopo.pdf
    • https://cdn.shopify.com/s/files/1/0443/4444/3036/files/82054435706.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/ac1200_range_extender_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/spotify_latest_mod_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/skyrim_grand_soul_gem_id.pdf
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/calentador_solar_casero_con_botellas_de_plastico.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/bk_ops_manual.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_off000068a3.bin
b483d7ee0dd0b35d58b5c9e5c4999325ad974675b8cde208194cbd826e9fd340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 5120 bytes
font_01_sfnt_off00007a2b.bin
36008fe9fe3671d42b7c58c8bde1da621e8ad251ed7d02b11781f1309b3ace05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2B 11196 bytes

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