Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b691eb3236ff03…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 17:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d112cb13843996c18bda0386534c7d1 SHA-1: 23896545b43e4dde3397d1d8416e90f76a4761df SHA-256: e7b691eb3236ff03df3f58f0ee1bb2066f079d3acb566e7209923bfe2bf26f21
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure via the URL https://ttraff.com/wix?keyword=les+messagers+des+vents+pdf. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same redirector URL and a Shopify URL, suggesting a coordinated effort to lure users to 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/wix?keyword=les+messagers+des+vents+pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/lebowurijoxokovif.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/anime_anatomy_poses.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/55024540927.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/85432471663.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/flash_actionscript_3._0_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/26313778819.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/66302636926.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/37224178308.pdf
    • https://cdn.shopify.com/s/files/1/0465/4917/2382/files/alternative_energy_sources_ielts_reading_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/jatuwunufofosu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/pizifudipev.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/jexumivizeniwoviwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/affidavit_form_texas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/master_p_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/bassinet_fitted_crib_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000629a.bin
10a5aab471b9c8f31e46e4fd1e881fcef5d37672b834ad83c46911c10be91e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 4960 bytes
font_01_sfnt_off00007359.bin
c2f90bbada3cf867dbf0266ecb09f0f9c5759ceaebeb7bbc6dc6acc3893d72fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 11528 bytes
font_02_sfnt_off0000979d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x979D 4324 bytes

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