Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b75049eab67013…

MALICIOUS

PDF

47.2 KB Created: 2020-07-30 13:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77071b363a16972f6e61574a05048bef SHA-1: bb257bd4629dc111673cccd56cec1cf6eb40845d SHA-256: 69b75049eab67013342a6ef068aba5effe5d6ceb6ed3b2e51dbbbdd8af512700
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The primary malicious URL identified is ttraff.com, which is flagged as a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=telescopic+belt+conveyor+design+pdf
    • http://files.barkway-village.org.uk/uploads/1/3/2/7/132740260/b54b5da92a.pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.brumleyceramics.com/uploads/1/3/1/6/131606289/fubifokubelisoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/10064118643.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/suwaruzol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/99322474218.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/2649345864.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/betogojububezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/57131532111.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/mobiretekasun.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/susugix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/44546932881.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/62141427871.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/norubavusazuvavu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dfb.bin
9a7551b702dd5f601b775fe1de6184b7dd0d2bb8d7b265974f76dbaa52d01a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFB 5152 bytes
font_01_sfnt_off00007f93.bin
7d5679a263d1218119d402277aaf6886171543c9d3b85ad2b217ef4590bd6a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 9768 bytes
font_02_sfnt_off0000a13d.bin
20434f0ff323b40553b74212b52eeaf793c420eb39a2b79069990027afc2400e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13D 3672 bytes

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