Malicious PDF — malware analysis report

Static analysis result for SHA-256 834e652e6651e0ac…

MALICIOUS

PDF

49.1 KB Created: 2020-08-20 00:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bba4890c8fec58cc7305d0b8c4b7707 SHA-1: e0732291c3a3b6501fdb62ba55214f79fae0ad6f SHA-256: 834e652e6651e0accf22c66699b5a408c62fdd8f43b980937b6b89a5bd04b548
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to lure users to a malicious site under the guise of providing a specific PDF. No scripts were extracted, limiting the analysis of further payload delivery.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=roman+tales+alberto+moravia+pdf
    • http://files.cannonridgehoa.net/uploads/1/3/1/4/131454286/124158.pdf
    • http://wemavit.robertkaltenbach.com/uploads/1/3/0/7/130775364/4840637.pdf
    • http://files.firstfreedoms.org/uploads/1/3/2/6/132681201/badaregi-pagujenobiwalin.pdf
    • http://daluza.waynecountyveterans.org/uploads/1/3/1/0/131070571/9c4c2b164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/muwekanexujeredozimije.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/82840067182.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/paul_richards_krdo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/ideological_conflict.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/3141322142.pdf
    • https://cdn.shopify.com/s/files/1/0435/4234/7927/files/38513205099.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/59835625452.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/87660993286.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/30555037103.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/38915309125.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/wimojorefejewar.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_off00007af8.bin
59c7631d44170930c320d425978670281a63bcf29f01cf82e4743dccc277c825
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF8 5396 bytes
font_01_sfnt_off00008d37.bin
20a57f9fed797aee4177343beb98d0c1438a7041b7ed922f9408e54a4238b781
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D37 13528 bytes