Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0ad11e4dfa25eb…

MALICIOUS

PDF

31.6 KB Created: 2020-08-24 03:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7fe630191f87aebb1cecefb8450a639 SHA-1: bd9753b97db51067cf6a5cb6b69aaebcb4673389 SHA-256: 5d0ad11e4dfa25eb268e9547abe0370f80421d0815f69da48ef7dad68c42c43d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, suggesting an attempt to disguise the 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=finding+fractions+of+amounts+worksheet+tes
    • http://rukolal.landseasurveys.com/uploads/1/3/1/3/131398285/067899a999.pdf
    • http://files.laptopdatabase.com/uploads/1/3/2/8/132814400/cfebe3ab261.pdf
    • http://files.christride.com/uploads/1/3/1/4/131407106/menafiwowusaji_bogimizixajeja_kejizoxivineziw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/rikijaju.pdf
    • https://cdn.shopify.com/s/files/1/0465/4222/5566/files/bremer_stadtmusikanten_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/map_of_europe_after_ww1.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/sphinx_of_black_quartz_judge_my_vow.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/garavorusij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0065/files/58759203292.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/xomuvolezizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/gixamosigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/lp_blighted_ovum.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_off00004048.bin
8cca0c130ef91233cfcb5f4f8497f873289fa188baabc9cab9db1054200d3678
pdf-font-stream PDF embedded font (sfnt) at offset 0x4048 5512 bytes
font_01_sfnt_off000052ea.bin
79aa58bbf1244527cf1b8b52352ca30b8af008eb96494988bab64915dc927c45
pdf-font-stream PDF embedded font (sfnt) at offset 0x52EA 8940 bytes