Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ecaec39a3c11ea…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 17:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f447bd83897fd1d90cd6d8e1cef4ef02 SHA-1: 14279c0d2f79dd370235b3c16dad8ecba5496439 SHA-256: 79ecaec39a3c11ea7b805ae719c1dd84ae75397d25c7c3dc8401a508c5057ea8
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, which is a common tactic for phishing or malware distribution. The document body explicitly mentions 'Beauty plus app for laptop' and includes the malicious URL, suggesting a lure to trick users into downloading potentially harmful software or visiting malicious sites. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=beauty+plus+app++for+laptop
    • http://fagedo.exeterthreading.co.uk/uploads/1/3/1/4/131406390/4631232.pdf
    • http://poxutiwo.pristinedetailingindy.com/uploads/1/3/1/4/131408027/dbb4c3ec1e92d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8819/1394/files/tubekiteza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/xifafatutiwek.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/figurative_language_review_quiz_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/electro_inc_accounting_simulation_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/nufajejinugosox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/nagavutowozumupoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/bedokovexukojufov.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/anemia_sideroblastik_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0437/4075/8170/files/auxiliary_projection.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/avantek_amplifier_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1421/files/tadawarezawovowav.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/494643836.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_off0000690b.bin
5f114b80972e08557c8bcc4c1678d30ebbdcda5a72d06d2d97c07e2dce374eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 5044 bytes
font_01_sfnt_off00007a47.bin
6e2b61e707530826eff41a91b8ff5d7378ef7a45a84b878701e849c566d95d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 10128 bytes

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