Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b386ae4d5a72780…

MALICIOUS

PDF

49.1 KB Created: 2020-09-01 04:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95054237b797c5e24afd445bdf41508f SHA-1: 80501b3d83d90642d26fac8099d5a83165e1309f SHA-256: 2b386ae4d5a727804ac876250f7d6c81083370319a7143d072c92bf8d8d96f75
128 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple PDF documents hosted on Shopify. One of the embedded URLs, 'https://ttraff.me/wix?keyword=static+gk+capsule+pdf+2019+ibps+guide', is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to malware downloads or phishing attempts. The presence of a 'download button' heuristic further supports this malicious workflow.

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.me/wix?keyword=static+gk+capsule+pdf+2019+ibps+guide
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/88761924186.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/gusufimisedikow.pdf
    • https://cdn.shopify.com/s/files/1/0438/0157/5586/files/tuwabojevilozep.pdf
    • https://cdn.shopify.com/s/files/1/0435/4614/9023/files/gauges_of_aluminum_sheet_metal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/bigabuwarun.pdf
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/21049980368.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/muvamax.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/penyebab_penyakit_jantung_koroner.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/atos_e_contratos_administrativos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9783/files/exercicios_de_verbos_de_ligao_e_ao_com_gabarito.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/hssc_clerk_answer_key_22_sep_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/vorawijigasezul.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/98413135145.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_off00008098.bin
0ab59b5522e68a57e8f163a0f3323dc51f1bbc46fa907fe7087f0b9e8cc754f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8098 6016 bytes
font_01_sfnt_off0000952a.bin
285a66b2f35a351bacdf68ae4989c9b2379d080c2dec5d467567437396ff365a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952A 10060 bytes

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