Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe3b73fb0b3961f…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 11:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb4f5336f520cc4e89997c6fb684ec1 SHA-1: adc192b7edcdadfdc9de2361787a0779eb8ad2f4 SHA-256: dfe3b73fb0b3961f0ebce7d36af65f1b630a54e22619aaa3372d8fcfd107edaf
152 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, disguised as a document about 'bargaining power of customers'. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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=bargaining+power+of+customers+pdf
    • http://files.shoplyndaanne.com/uploads/1/3/1/3/131383358/4599353.pdf
    • http://files.mrfitzbiology.com/uploads/1/3/1/4/131406744/8131378.pdf
    • http://files.cherylquist.com/uploads/1/3/2/6/132695401/dogifove_bemalopapoxur_kaxesujaxebas.pdf
    • http://files.tomfosterclippers.com/uploads/1/3/0/7/130738524/4bdc8a.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/tda7294_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/asian_paints_texture.pdf
    • https://cdn.shopify.com/s/files/1/0448/5450/9729/files/mastering_autocad_civil_3d_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/mirifiviserumabugomuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/antologias_de_cuentos_infantiles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/gujifawisiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/catalogo_avon_5_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/jorubisowunisigilube.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/pigixibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/12323341537.pdf
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/berewadobilodidetigok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/cornerstone_chords_key_of_g.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_off00006aed.bin
9b30d81a4ab811d0554f8e0f674fc6c317f384ffa036ffee8e41cc79411d7d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AED 5464 bytes
font_01_sfnt_off00007d7b.bin
d6cf56c223f4341d1a7e86b8dc99f73fd2ff0a59f888869d0c4d596f405317a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 10172 bytes
font_02_sfnt_off0000a045.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA045 4324 bytes

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