Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b581e72274fc33…

MALICIOUS

PDF

44.7 KB Created: 2020-08-27 20:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f4b43810e20ef0dba53735a3446789 SHA-1: d1836a550a358fd7deb8bbceae2ebe96afef4505 SHA-256: 30b581e72274fc33bebbb63d2db5dc48cda88fa436b8fba5efdf317ebae5751d
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate documents. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=ecg+pdf+manual', which is likely intended to lead the user to a malicious site. The document body, though heavily corrupted, contains fragments suggesting it is disguised as an 'ECG pdf manual'. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=ecg+pdf+manual
    • http://files.dcequestrianimports.com/uploads/1/3/2/7/132740978/4183541.pdf
    • http://files.mcnairy.com/uploads/1/3/1/4/131454373/tugogavekofawez_sekoke_damapu.pdf
    • http://files.wildwoodsprings.org/uploads/1/3/2/6/132695392/lopamibul-fozerefidu-tuzubida.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2965/files/54388893409.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5190/files/elkay_drinking_fountain_cut_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/93239029694.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/platforms_in_old_delhi_railway_station.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/zopijomefowokufelodorunud.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/ligapamurip.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/nature_domain_5e.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/nelson_grade_12_biology_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/accident_report_number_abu_dhabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/16623929107.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/zafudejali.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/dusuxezuragiw.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_off000072c5.bin
e840f912e6bdeb2127df5dcba640d64c018dc41410fff8db63d5d6b653a37426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 5160 bytes
font_01_sfnt_off00008446.bin
a400fa7ada121a64058d7eefc58410022ec538c857edc3b5ecdeb4d10b1abf4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8446 9832 bytes

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