Malicious PDF — malware analysis report

Static analysis result for SHA-256 602bb01f54c8180c…

MALICIOUS

PDF

61.7 KB Created: 2020-08-21 03:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af1bdf1becbaa5c01b51b8b5a584671e SHA-1: ce39a25e1a751a31799f4873be02016470416d8c SHA-256: 602bb01f54c8180ceffc8de02bd237089efb61b0bf651965dba4cfd04e3bad51
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the string 'Chemical analysis of water report' and the malicious URL, suggesting a lure to trick users into clicking. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=chemical+analysis+of+water+report
    • http://files.stbasilbasketball.org/uploads/1/3/1/6/131607232/suzebi-lekij-xelugibexu.pdf
    • http://files.wctohio.com/uploads/1/3/1/3/131383838/7552629.pdf
    • http://files.nyjincho.com/uploads/1/3/0/9/130969308/780680eef4b755d.pdf
    • http://nejutari.wildchildequestrian.com/uploads/1/3/1/6/131606758/zanikalidejuzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0465/1479/8750/files/50978857293.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/queen_s_blade_spiral_chaos_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7623/files/zirenuxede.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/address_in_english_format_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/96552947606.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/espresso_android_unit_testing.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/79428617573.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/61013919827.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/bamenepezafumerus.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/bunadarifipus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.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_off00009b52.bin
424860bd80152c15c42e2e17486f07ecdecf656fd8168e63fc2da8df1cf19dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B52 5260 bytes
font_01_sfnt_off0000ad1a.bin
e27920c8999fb7091e676a80dcdd4113054d0f524d683ddfadcfdba494a2cc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1A 15188 bytes
font_02_sfnt_off0000dc00.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 4324 bytes

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