Malicious PDF — malware analysis report

Static analysis result for SHA-256 1862a46043cf9028…

MALICIOUS

PDF

40.0 KB Created: 2020-08-24 12:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35a659dff1b21814460405d989a29fbc SHA-1: d217099509ce1e75e0b5ca7eb716645c7303319b SHA-256: 1862a46043cf9028bbe0df34b3a9a0b4e3c8a697809b574a8d6014f0872ee78b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify-hosted files. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=fractions+halves+worksheets
    • http://files.jskennelsandtraining.com/uploads/1/3/2/7/132741144/puwaxitorunejepitisa.pdf
    • http://zutew.cyclonejerseys.com/uploads/1/3/0/8/130874330/6896636.pdf
    • http://kadowo.tmpropertysolutions.com/uploads/1/3/1/4/131437987/luluzom.pdf
    • http://files.seantreasure.com/uploads/1/3/1/3/131383358/jozefijofulezeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/60958956261.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/96301852476.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/bobesarivewuxisuzinofekuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/how_to_manual_skateboard.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/30385823986.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/5993250636.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/re_zoom_istvan_banyai.pdf
    • https://cdn.shopify.com/s/files/1/0457/5297/5516/files/61364129204.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/xuwokawakupugur.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/disneyland_los_angeles_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/xemotet.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_off00005fc8.bin
f106bf244983772e500a868bbcaf4ca19995919e714cec94292eb0fd422e79a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5056 bytes
font_01_sfnt_off00007109.bin
7e3a72c295fa745e0135bcc00c623f0a0d8c4b1f16d5df8d6c40d31e623b745c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10156 bytes