Malicious PDF — malware analysis report

Static analysis result for SHA-256 916298b1706044aa…

MALICIOUS

PDF

68.0 KB Created: 2020-08-07 07:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b088d0dc476ca94b367add591118f79d SHA-1: 2eb04f6cfd41921c8615b7c272193e0aafae71c2 SHA-256: 916298b1706044aa80f5212ad9cd15b6c56504a6145c259932c4559be76da227
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. No scripts were extracted from this sample, but the presence of malicious redirector links and the ML classifier's high confidence indicate a malicious intent to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=basic+symbolic+logic+pdf
    • http://files.empstudio.nl/uploads/1/3/0/8/130814283/giresusopebubune.pdf
    • http://files.deanmelbourne.com/uploads/1/3/1/1/131164231/40fd612ea.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://files.juliehoy.com/uploads/1/3/1/8/131857920/zitadatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/37597666338.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/55794186724.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/80115281767.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/55345792549.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/rasusok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/dimomaxogefufofazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/xosigosijasig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/bumof.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/nalarizoparoxopopaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/panasonic_kx-_tga931t.pdf
    • https://cdn.shopify.com/s/files/1/0436/8020/2905/files/morphology_and_cytology_of_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/set_up_a_good_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/ash_wednesday_summary.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d8c.bin
fd5440f1f4ebd54dd290775a513d6667410e5d7dad2da1c0f13fb7f66398bdbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 6856 bytes
font_01_sfnt_off00007ed1.bin
591cb21b2cc033027349082ef95aa1b0d587845ced3d16c33514b53cd2289a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED1 5668 bytes
font_02_sfnt_off000091d7.bin
999ffa05984f2c565fe2260c24d0b52652f7a9afb2ab86b4a8a28133ef9bdd68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D7 6296 bytes
font_03_sfnt_off0000a13f.bin
a33cfea0447beef54ca26f039ad27dca03230628658043f1887535dd7b4095fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13F 9052 bytes
font_04_sfnt_off0000b379.bin
ddba669fad34d3312a84ac495a0d3cbb140dfd4df243d41622f4821eff0174b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB379 1696 bytes
font_05_sfnt_off0000bbf2.bin
a93699fc6dec8227cdf8abbf4dbd45744e828c793ddeced63e491ef53028c672		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF2 11540 bytes
font_06_sfnt_off0000e315.bin
d619a0f13cab24f362f1457a2e63259530c362f6dc2f99bb36981149f3ee2984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE315 18636 bytes

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