Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3920e51b03a31e…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 07:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6cebea54dba3c7c21d248755abd3a3 SHA-1: aa123f88eb95067cc061abeac7a75b9cd818cda6 SHA-256: dd3920e51b03a31e0c92ccf8f91ecd2452a56c90c217f3f7e4dc8034f8071253
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to further malicious content. The document body, though heavily obfuscated, contains text related to 'film genres list pdf' and the URL itself, suggesting a social engineering pretext. The presence of numerous embedded links, many pointing to Shopify domains, indicates a link farm strategy to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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=film+genres+list+pdf
    • http://files.paramountdesigngroup.net/uploads/1/3/0/7/130738993/5474835.pdf
    • http://files.sewmuchforthat.org/uploads/1/3/1/3/131384071/083ea65aaeaa.pdf
    • http://files.oceanfrontsugargliders.com/uploads/1/3/0/7/130775062/zilizifedowu_rorodezomezebo_tixasefinubara_wurezuk.pdf
    • http://files.sewmuchforthat.org/uploads/1/3/1/3/131384071/083ea65aaeaa.p
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/dream_weaver_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/tunawujimoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/vodagulewirak.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/cancer_de_pulmon_elsevier.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/sofarogud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/jisazepanilo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/10326931550.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/methods_of_genetic_engineering_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/41975157744.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/nenumaporudigupilaxiteva.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/autocad_to_converter_free_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/apa_6th_edition_citation_format.pdf
    • https://cdn.shopify.com/s/files/1/0436/1158/6722/files/loropepitixa.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_off00007dd4.bin
cba3b9a54fc7c3e585793138af82da40c321fec67c2fb939b9bf6bb438dc34c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD4 4784 bytes
font_01_sfnt_off00008df4.bin
328069b3ad183dec5fb97d4813e949a0435ef874b2c04ba320cbac46df5971b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF4 10392 bytes
font_02_sfnt_off0000b16b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB16B 4324 bytes

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