Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef350af5b2147b35…

MALICIOUS

PDF

38.8 KB Created: 2020-08-22 05:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6661c3558f3748c3a23394737206c0 SHA-1: 60ec84a6d4bf6bab587a7d75b846a893704ca9e0 SHA-256: ef350af5b2147b352d588e5ace8a5cc3fcd75c526738ff9d8cab7436681ae081
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure related to 'Virgin media answerphone service' and includes a link to a known malicious redirector. The heuristic 'SE_CALLBACK_LURE' indicates the document prompts the user to call a phone number in a context of billing, refund, or security, consistent with callback phishing or tech-support scams. The presence of a link farm, with many external PDF links, suggests an attempt to manipulate search engine results or distribute further malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=virgin+media+answerphone+service
    • http://files.openingnightcostumes.com/uploads/1/3/1/3/131380504/roxapoparapan_seser_tujoja.pdf
    • http://taninamo.faceartandmore.com/uploads/1/3/0/7/130775997/6843a3.pdf
    • http://files.escaperoomelectronics.com/uploads/1/3/1/6/131606807/bumexupa.pdf
    • http://xudenonag.lamsgolflinks.com/uploads/1/3/1/3/131384605/8800960.pdf
    • http://sosodaro.studio1999.shop/uploads/1/3/1/1/131164250/9503018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/canadian_passport_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/neverware_chrome_os.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/gixunerup.pdf
    • https://cdn.shopify.com/s/files/1/0461/7689/5129/files/gravitational_potential_energy_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/biwufiwupol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/23786838055.pdf
    • https://cdn.shopify.com/s/files/1/0463/2746/4097/files/top_rated_hair_dryers_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/wefiwamumetuzisoxax.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_off000059e8.bin
3802081133545786fe4b37623ff390ffadeaa118c321105a2a3f1732aca0ecb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E8 5572 bytes
font_01_sfnt_off00006cc0.bin
54862171bac07e444390f81627ed0c578d8d30501f3a06b331ed3af6d8a49fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 9948 bytes

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