Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db698382f16f4eb…

MALICIOUS

PDF

44.4 KB Created: 2020-08-24 14:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e507e999fd3cb3486dbb5141445c0066 SHA-1: cd1587c6e7964d0268cff53cbb431cb9ed6b9488 SHA-256: 4db698382f16f4ebfd1364f40709776b09ad028c61e7b4e36eb87db71c3f34ff
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector, indicating a social engineering attempt to trick the user into downloading malicious content or visiting a compromised site. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document prompts the user to install a browser extension or update, a common tactic for credential theft or malware installation. The primary malicious URL identified is https://ttraff.ru/pify?keyword=pdf+to+word+converter+nitro+pro+9.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=pdf+to+word+converter+nitro+pro+9
    • http://files.pempickleball.com/uploads/1/3/0/7/130739415/numuzijesasulux.pdf
    • http://gijavuro.totalbusinesswebsitesolutions.com/uploads/1/3/0/7/130739892/ziwimewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/expenditure_method_of_measuring_national_income.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/charities_aid_foundation_2019_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/42239523018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/44291694872.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/22830619664.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/99961326282.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/django_template_tags_not_loading.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/21914697462.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/65603081130.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/livro_cantico_dos_canticos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/gijobutimuzefozudotara.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_off0000712f.bin
2be912487b8524fcacf98f150dffadbd1367295620e126070c055c969fbf7b20
pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 5040 bytes
font_01_sfnt_off0000827f.bin
268c06dc744a62d85244626532bcec65b0c75a04cabc5c06bb5e047e695dbdf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 10076 bytes