Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbad8879fb27d57…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 10:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6437520106cce2f5d231700046bebab3 SHA-1: d9986eeacb97141ef24f4668e071c1b90778548f SHA-256: 3dbad8879fb27d575be71758acf0c1b9c10e11934d495e2297d1f5490f39cb0a
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a syllabus. This suggests a phishing or social engineering attack where the user is tricked into visiting a malicious site. The presence of a link farm further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=esic+stenographer+syllabus+pdf+download
    • http://remujite.onebeyondsight.com/uploads/1/3/1/6/131606758/dugazimeri-lovijal-magam-xitavuwagebo.pdf
    • http://bejijox.lanecovedressage.com/uploads/1/3/1/3/131379246/salimat_razusufadube_lesali_vateserabap.pdf
    • http://files.whatdowewantfilms.com/uploads/1/3/0/9/130969370/wegewupawanewidavewe.pdf
    • http://files.janemennigke.com/uploads/1/3/1/3/131398144/4809014.pdf
    • http://files.novamal.com/uploads/1/3/1/8/131871699/a54ebc82b3.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/58687399804.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/salabovalepuwezivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/60936849154.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/4270260346.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/embed_a_in_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/lefawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4631/files/74162652146.pdf
    • https://cdn.shopify.com/s/files/1/0441/3197/5320/files/7392795542.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/27718618958.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/54228671156.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/2997111089.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/compound_adjective_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/linedozanogikizijodopivo.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/
    • https://cdn.shopify.com/s/files/1/0441/3197/5320/files/7392795542.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f38.bin
fa83ddf4c51d9b1b9c50e6fe0a31f745e1807069e6d52c75c032ef28e6745b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 5708 bytes
font_01_sfnt_off000082bf.bin
6974b55cd679c4beab141699d45d6f0d6d07000a61225405d89b297543922bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x82BF 10064 bytes