Malicious PDF — malware analysis report

Static analysis result for SHA-256 798954e232016ea6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 01:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebc64a962434b25a6bd643a3d3a2be6f SHA-1: c0dd5b29aa182189fbaa19919d8d069327cf550f SHA-256: 798954e232016ea6b8225d68f89642e91401770f29af1a85d567e9a6d2488d04
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to lure users to malicious infrastructure. The presence of many PDF links also indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

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=drakor+marriage+not+dating+drakorindo
    • http://files.chieftechnologyofficer.org/uploads/1/3/1/3/131381103/gamifez.pdf
    • http://files.dolphinhousea1.com/uploads/1/3/0/7/130740255/lerezedox.pdf
    • http://rebam.taxcetera.ca/uploads/1/3/1/3/131379935/jifiji.pdf
    • http://files.bengrayzel.com/uploads/1/3/2/6/132681245/noxexozi.pdf
    • http://poxavol.freshhawaiilei.com/uploads/1/3/1/4/131408899/mibovorewipiv-loxikemegimux-mewijopilibona-zazusevos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/how_to_convert_miles_to_kilometers.pdf
    • https://cdn.shopify.com/s/files/1/0464/0725/4171/files/nintendo_switch_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/30554426958.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/50219978869.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/centerpoint_energy_contact_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/53282119129.pdf
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/besikunigozixuzaxemukora.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/50906337718.pdf
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/xurexegafugiva.pdf
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/38778641917.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000616b.bin
2ed4c426e88418c89956c0d233516fb1d17512f7832356865b677c2d7d42218a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 3004 bytes
font_01_sfnt_off00006c30.bin
6de85bc268691c9154da67d322ee32013174012be5f3eacdaacd9fcfdfc07e49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C30 5000 bytes
font_02_sfnt_off00007d1c.bin
cfe533e720c414cadcefbbf3997092f3d59cb86bb20c486333ac66f7890d81b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1C 10332 bytes

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