Malicious PDF — malware analysis report

Static analysis result for SHA-256 a917505986aad41d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-24 04:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01270ba165f8bfe2ff18908b8989c74 SHA-1: 512ab6852b05da4079dd9872d0a80002b53f6455 SHA-256: a917505986aad41d25e8a7c3e64ea9ae117cc92c16e1feb31f427765b5c44d1f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to potentially malicious redirectors or unknown domains. The primary malicious link, https://ttraff.ru/pify?keyword=beginner+acting+resume+template+word, is presented in a context suggesting a resume template, indicating a social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=beginner+acting+resume+template+word
    • http://kolidekoz.barryshlachter.net/uploads/1/3/1/4/131407227/2153812a589.pdf
    • http://files.fbrhaiti.org/uploads/1/3/2/7/132740204/xemavuwabarotikufupo.pdf
    • http://gosej.kerrieannespicer.com/uploads/1/3/1/6/131637836/ff2c7b1529e85.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/british_guidelines_warfarin_reversal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/pepuvubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/9996655151.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/bibosudamipokefupipibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/wufusiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/41961755532.pdf
    • https://cdn.shopify.com/s/files/1/0447/6397/1733/files/25397836522.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/silver_bullets_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/gogujunifegibuxedajexik.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/management_accounting_journal_articles.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_off00007c5b.bin
3819ba17a38ade4893d9471c190bed96f0f7b94e88eb9bca15edb6f2efceff36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 5536 bytes
font_01_sfnt_off00008f1f.bin
db985614d565f1037e7d33b7dd3b2a58da363292e38acf5e9fa38674fd6e604d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1F 10052 bytes

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