Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedc6c28b0f7af23…

MALICIOUS

PDF

44.4 KB Created: 2020-08-13 23:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77409fbce24a7da6b3e2af2ec6fed4de SHA-1: 01c285da2d195dacee957334d8fb934edfe52288 SHA-256: aedc6c28b0f7af23065407b0deec61264f253c61237207c6f022569f7958ce4c
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=google+sheets+textjoin+new+line`. Additionally, it features a PDF link farm with numerous external links, including several hosted on Shopify, some of which are confirmed benign but others are unknown. The document body, though heavily obfuscated, also contains the malicious redirector URL and several other PDF links. The presence of a 'Password-protected archive handoff' heuristic suggests a common tactic to bypass gateway security by requiring a password for an attachment, implying the PDF is a lure for a subsequent malicious payload.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=google+sheets+textjoin+new+line
    • http://sesewo.aclickawaytraining.com/uploads/1/3/0/7/130775203/gufunuvidakijodedoj.pdf
    • http://files.meganmcgarrymusic.com/uploads/1/3/2/6/132695829/meragesa_zafamero_gedati_bidaw.pdf
    • http://kafag.ahrchurch.org/uploads/1/3/0/7/130776818/wizeboxuluge.pdf
    • http://fupomanal.kahulapiko.com/uploads/1/3/1/1/131163635/7c5c61fb270c20.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/cancer_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/41444408276.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/app_store_optimization_bible.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/85560815150.pdf
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/6938145472.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/apgli_application_form_ap.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/64332142505.pdf
    • https://cdn.shopify.com/s/files/1/0437/1965/5579/files/business_analysis_and_valuation_using_financial_statements_krishna_palepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/mokifamozomofalavafoner.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/41036130538.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/hebrew_bible_old_testament.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/zulufesudawobiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/ielts_writing_task_1_sample_answer_band_9.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_off00006f21.bin
b53d1897337041a05f250d464e39ab02fc9e8f4aa2d4436fef14ff0ada62c54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F21 4908 bytes
font_01_sfnt_off00007ff8.bin
bcabfc1b9bc30dd38cc69bf5e7a24735ded48f3b0231e834f4b6c86e5bf00004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 10836 bytes

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