Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acdd9f35f5e956f…

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 12:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd669eaf1f5b26d234460fe3cf33262 SHA-1: edb5ce237cd33991fb50e571843b9c2afbcc04f1 SHA-256: 8acdd9f35f5e956fa233ef5260d9d027f1216b43f1dab5179ca9d06cd56face5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=beta+galactosidase+reporter+gene'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous links, many hosted on shopify.com, which are likely part of a SEO poisoning or phishing campaign. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=beta+galactosidase+reporter+gene
    • https://cdn.shopify.com/s/files/1/0437/6274/5501/files/pujivoratenugowobuboror.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/21908873857.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/zozobininatunegaxure.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/46869925117.pdf
    • https://static.usrfiles.com/ugd/63d3ad_e37469f3be9e44818301dcbe5aeba5e6.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/29705976881.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/live_and_licence_agreement_format_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/silent_hill_3_endings.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/wowimegimonitajajeruned.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/29875812919.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/barbie_hair_styler_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/9059/8305/files/free_a5_brochure_template_indesign.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/how_to_install_seus_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/canciones_de_guitarra_acustica.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000727c.bin
8b511c58d3234fa9e6ad089c95d1dc2bd0b31f87be7a4d6a8849fccc4da5c7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 2912 bytes
font_01_sfnt_off00007ce1.bin
633a17543832b3172a7ef26ca06341cf1ecb3b1948978de829e636e5b0794b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 5080 bytes
font_02_sfnt_off00008e24.bin
3aca3a72042ed2d34335ba5d71d102150651438c1cc8e740b65ba0830690b5f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 10008 bytes
font_03_sfnt_off0000b06d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06D 4324 bytes

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