Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c916b9a22864fa2…

MALICIOUS

PDF

51.3 KB Created: 2020-08-06 21:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6c9634fabfabf62e32133238a9cf053 SHA-1: 2fd846a80422ab946a38ed179be17c53dad33f45 SHA-256: 5c916b9a22864fa252dd7000863e7f40899e64fea0f5d6fb99a51ec1e19c937f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are designed to appear as legitimate PDF resources. These links ultimately redirect to a known malicious domain, ttraff.com, indicating a phishing or redirection scheme. 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=maladies+infectieuses+definition+pdf
    • http://files.samanthaecooper.com/uploads/1/3/0/7/130776573/ee3aefb7e.pdf
    • http://files.naturalstrandsofbeauty.co.uk/uploads/1/3/0/9/130969206/mimoje-turoz-politem-milukasiraxuraz.pdf
    • http://files.addycakescookies.com/uploads/1/3/1/0/131069934/6987460.pdf
    • http://fenodavif.cyberedchristianschool.org/uploads/1/3/0/8/130814017/b7e28f627a7.pdf
    • http://files.taylormadebling.com/uploads/1/3/1/4/131437978/nurasiborurebanajupu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/syma_x5sw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/57601748327.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/totitesavoxelenugoxanawin.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/oxidative_phosphorylation_steps.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/timex_wr_50m_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/jepulopovidejiliv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/arnold_chiari_malformation.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/6786204889.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/business_english_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/49838637621.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/31688737468.pdf
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/pinelaxirisinememedumefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/75108574372.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_off0000898d.bin
788073b6c34ff2b871e28445c72ca541e661118e95b272fba39fd0b3d606024b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 5056 bytes
font_01_sfnt_off00009ae6.bin
f20a3133cec92fae611c5eea90ae67013f75481b3218615c5b2ef98bb6f2c7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE6 11076 bytes

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