Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7afe851aa1526ca…

MALICIOUS

PDF

55.6 KB Created: 2020-08-14 02:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af12fda65e03d21f4f2e01b5ddc8776 SHA-1: f09341bc5bdfd72b3286ef73debd9afbdf7ff43e SHA-256: a7afe851aa1526ca9483bb53569496f4b62cba3eed72a58e80665adad1b552f5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The file is likely part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=anbae+per+anbae+song++tamil
    • http://nivogokif.soniabarneydesign.com/uploads/1/3/1/4/131452954/gosivadesafinupaka.pdf
    • http://guvede.wireart4u.net/uploads/1/3/0/8/130814328/4128589.pdf
    • http://files.sportzlifeone.com/uploads/1/3/0/9/130969332/0eb3d7f1205b070.pdf
    • http://files.deefitzsimmonsphotography.com/uploads/1/3/1/0/131070469/garobap.pdf
    • http://files.greyfriarstutorials.org/uploads/1/3/1/4/131407668/069cd123816788.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/cadena_trofica_ecologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/dotuvedopixar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/56143601469.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/31714051714.pdf
    • https://cdn.shopify.com/s/files/1/0440/1109/4174/files/25100770276.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/81516774730.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/wawigibebisowenefomonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/wnyc_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/5139/1907/files/78468808948.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/63037873593.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/66857220989.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/jigejiduvemokopafus.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
stream_004_off00007eaa.bin
1222eb6181f9e1d6c83838c0f8a8c0c4e1c5454657c2be17df773f77448a29a1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7EAA 15964 bytes
font_00_sfnt_off00006ce2.bin
3d5c55b09bb2bac8208bc30f44cffb2e6e2c251cd21f6a4efe92fc22ab4ca294
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 5268 bytes
font_02_sfnt_off0000a391.bin
3d893916fc490e0493087bcf7140a147991aba23513267d9108d0c6585e2a893
pdf-font-stream PDF embedded font (sfnt) at offset 0xA391 14728 bytes