Malicious PDF — malware analysis report

Static analysis result for SHA-256 715250808589c5ab…

MALICIOUS

PDF

45.0 KB Created: 2020-08-20 03:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4498dd7a4cd3994f57db4e7d003026 SHA-1: bd5fb8a0ebb05cc11af63824c286284decc3144a SHA-256: 715250808589c5abac641e58a12c6fc21ba5a7d5f9e235cc55ab698815479de4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=desoto+water+quality+report', suggesting an attempt to redirect users to potentially harmful content. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

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.ru/pify?keyword=desoto+water+quality+report
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.laserquestbournemouth.co.uk/uploads/1/3/1/8/131857334/lifopurub_latatowisasujat_jobazepipaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/joxevikakedudokanodimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/83562984584.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/agni_natchathiram_video_songs_hd_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0108/files/50755715841.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/zexamefan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0199/files/juluzonedejew.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/pdf_file_to_word_doc_converter.pdf
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/cercle_de_la_forme_chatillon_horaire.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4725/files/ic_cd4011.pdf
    • https://cdn.shopify.com/s/files/1/0441/1280/6040/files/ff12_gambits_guide.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_off0000740c.bin
35c2caf37c99dbd32958c44eae50a98504b64371da54a77ee70a51c740eb120e
pdf-font-stream PDF embedded font (sfnt) at offset 0x740C 5132 bytes
font_01_sfnt_off000085b1.bin
de592c7728fa76c48b69e48a0f65eec00a4f5be65a55b3adf3ada8dad943ca5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B1 9820 bytes