Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6df1595389b72b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 00:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c582793e2b7c280b2e2ce349051bcc SHA-1: 54ca79e22f969f34cc2bb1fe6b5282867351a8f1 SHA-256: fb6df1595389b72b06b629b023a2021b65a5b674436a74d0d2c4e9938af0976b
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for software downloads, specifically mentioning 'Bluestack free for windows 7 ultimate'. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute the malicious payload through various means. The SE_DOWNLOAD_BUTTON heuristic further supports the lure-based attack pattern.

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.com/pify?keyword=bluestack+free++for+windows+7+ultimate
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://xizew.manueladamant.com/uploads/1/3/1/3/131398394/8046208.pdf
    • http://tofizev.sfchildrensgardeningcircles.com/uploads/1/3/0/9/130969162/danejevalizisene.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/64799549826.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/free_sample_electrical_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0461/3858/9352/files/create_notification_android_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/88308302592.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/74516034583.pdf
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/majetemivofepetevat.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/faserolenidutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/miss_grand_international_2016_question_and_answer.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/grade_12_physical_science_textbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/pengendalian_nyamuk_anopheles.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/zeliro.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_off000069fc.bin
2c26602d9db3b360c7b9f108fa0b48d34da7f0e7ca71563c6e24d0d7fd31763b
pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 5452 bytes
font_01_sfnt_off00007c81.bin
17b65c7bbe83c77b143ae7eb9f2e029ac7da84fadb4f4b7ce1f0a99592b85469
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C81 9968 bytes