Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3168566c847f91…

MALICIOUS

PDF

62.6 KB Created: 2020-08-14 18:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3384de2e7d233a8295e9711ac8e2e4c SHA-1: 3ffd9b9668558ea494a862eab2f2a3a1ce20e3aa SHA-256: 7a3168566c847f911787c2aba09deecaaa0f0f134d04e2e8dd05dd672ae1fbe2
154 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior by acting as a link farm, redirecting users to potentially harmful content via the URL https://ttraff.ru/pify?keyword=the+promised+neverland+isabella+song. The presence of numerous external PDF links, many pointing to Shopify domains, suggests an attempt to obscure the malicious destination and leverage seemingly benign hosting. The ML classifier strongly indicated maliciousness.

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=the+promised+neverland+isabella+song
    • http://files.mgracetransitions.com/uploads/1/3/2/6/132682171/dobeni_wonodeneku_miluj_jozotum.pdf
    • http://files.tresjolielanecove.com/uploads/1/3/0/7/130776887/4427871.pdf
    • http://nijifav.cpastisradart.com/uploads/1/3/1/4/131438800/xuroti.pdf
    • http://files.mx.nrvprocessing.com/uploads/1/3/0/9/130969231/c2198676.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/certificado_medico_cdmx_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/shadow_of_mordor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/vubetefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/16362699576.pdf
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/xetana.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/xuxoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/juzuneravufosupafuxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/john_deere_770.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/bhagavad_gita_by_prabhupada.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/57531232770.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/wudasitubikejozurukaputa.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_off0000ab35.bin
564d4f8c4efb3174c576a0ed3ae4a0bf5f139af6634ce7f4400d46372982ed60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB35 3752 bytes
font_01_sfnt_off0000b878.bin
7754bba5cd04769ae495e61566d8a44c50850562c5fc08939547149c6d677d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB878 5520 bytes
font_02_sfnt_off0000cb18.bin
a7323f262d6464c45bcf6b28af7793d5d01cca951e0f7faa304d83d02cdde9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB18 9896 bytes

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