Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd43ba1c90a866a…

MALICIOUS

PDF

39.5 KB Created: 2020-08-20 00:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6989b600bd696b70c3926154f502b285 SHA-1: 4a1b2a2fde250f5bcc5e6b97de1e9ae445477e05 SHA-256: bfd43ba1c90a866af2e3a9acce6e5ae585c49d580243ca179ef5fba2cfe3fc47
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=combined+gas+law+equation+worksheet'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, some of which are confirmed benign while others are unknown. The presence of a malicious redirector suggests an attempt to deliver a secondary payload or conduct phishing. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=combined+gas+law+equation+worksheet
    • http://lifipi.sertoma-gunshow.com/uploads/1/3/1/3/131379992/fepalezobazo_poronew_nipupowo_ridoma.pdf
    • http://jepov.dbssstingsoccer.com/uploads/1/3/1/3/131383982/efcffe9401efb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/fugevokulopojogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/canon_lide_220_driver_offline.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/rasukuxafuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/namibin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5263/8116/files/73089168642.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/ziviwipatuxomolebizazozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/traditional_kwanzaa_songs_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/wibigepupamid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/vigowejabutidavumasasipen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/vertical_integration_in_supply_chain_management.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_off00005c20.bin
93516fbad7080764a9460a321c4e9eac8a674017be985e92b44722e7974a40a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C20 5564 bytes
font_01_sfnt_off00006ee3.bin
b54d1b36d009296b9eccb32316c9c6727e3ce064204f40f0c853a3eacd8d074e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 10076 bytes

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