Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdde7c86297d0bf…

MALICIOUS

PDF

53.8 KB Created: 2020-08-22 22:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae8540aa3b45acc1ff623842f225d14 SHA-1: 23257e68fb9bf57146eb4e58b48abb3cd95253ab SHA-256: bfdde7c86297d0bfd01b527570af184fe3bc021ebfebf49c5ba19b270e2c09c8
128 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body text, though heavily obfuscated, contains the phrase 'Spreadsheet for tracking household expenses' and the malicious URL, suggesting a lure to download a malicious file or navigate to a phishing site. The presence of a 'download button' heuristic further supports this 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=spreadsheet+for+tracking+household+expenses
    • http://files.afmemphis.org/uploads/1/3/1/4/131438776/bisuta-wetobalaxabirik.pdf
    • http://files.stevenwojtowicz.com/uploads/1/3/0/8/130873826/kopojupuwi.pdf
    • http://bonik.geoffx.com/uploads/1/3/1/3/131383483/2f98383a765.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/backup_restore_android_sms.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2587/files/bel_canto_singing_technique.pdf
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/xanevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/free_sheet_music_writing_program.pdf
    • https://cdn.shopify.com/s/files/1/0447/5705/7685/files/belanaturenigelazofum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/a_p_airframe_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/febemisazowebifunogujaxus.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/68596304748.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/pediatric_nutrition_assessment_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/3690874893.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/appreciative_listening.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/85365950431.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b9b.bin
39448b5dd37da445802e36ecc33dbff7d8af5e25e54401843070709029613feb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 5652 bytes
font_01_sfnt_off00008ed1.bin
c011f40672e17bfecf30c34d698e5c336303aae4f6dcfc932aee12dbe25b3c22
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 10852 bytes
font_02_sfnt_off0000b423.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xB423 16312 bytes