Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bd121f3a641015…

MALICIOUS

PDF

41.1 KB Created: 2020-08-12 01:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222add4c18aee3ee1fa24e06c8f5a0ad SHA-1: e2897f20d549725a33c68e41665a697498a7af74 SHA-256: 60bd121f3a641015f8edc5434215ae38863da83013066164c999a469b1c54ea6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify-hosted PDFs, suggesting an SEO link farm. One prominent URL, 'https://ttraff.ru/pify?keyword=casio+fx+85gt+plus+manual+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a Casio calculator manual and the wkhtmltopdf application, indicating a lure to disguise the malicious link.

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.ru/pify?keyword=casio+fx+85gt+plus+manual+pdf
    • http://lesezeget.ramonbullard.com/uploads/1/3/1/1/131164250/2054805.pdf
    • http://dusomi.jennyblackford.com/uploads/1/3/0/8/130874359/5044750.pdf
    • http://files.hssuaai.com/uploads/1/3/0/7/130776016/7889214.pdf
    • http://edu.casio.comCASIO
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/silafatomodajafafupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/xexirixajafulek.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/63432280027.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/iphone_device_name.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/14525816484.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/54448902773.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/bexovuvoxufegakina.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3105/files/presiones_de_las_cavidades_cardiacas.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/63189069514.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/vexewuxexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/98833353021.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d8.bin
dfaebcea2437ab5356da773c80787ee32ab8da2eb87b50330025a5994f49c0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 5556 bytes
font_01_sfnt_off000075ab.bin
fc180c479a5ff7ebb0d981604074ac17e43639dbeb2503c426fddd172c28d5ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 10000 bytes