Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8847c440e5ddc00…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 10:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2f7e84089d83bcd7151e4fa433cccc SHA-1: bd82bacceb4dfb8e3aebc2e5a1411152062d2ef3 SHA-256: d8847c440e5ddc006c7df28dc0e7e90bd3d1256e3525bc9489c7b9408872f898
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure, presenting itself as a 'Genealogical tree template word' to entice users. It embeds multiple links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This indicates an attempt to lead the user to malicious content or further stages of an attack. The ML classifier strongly supports the malicious nature of this PDF.

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=genealogical+tree+template+word
    • http://giwasuz.basingstokemrs.org/uploads/1/3/0/7/130775904/vibitozafage.pdf
    • http://sulatib.stevicosta.com/uploads/1/3/1/3/131380213/gewarip_gejoxidoxedug_bozofapuvuzi_wakizune.pdf
    • http://files.fxbrwanda.org/uploads/1/3/0/9/130969809/tubetavowavamoz_ferorilobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/bses_delhi_duplicate_bill_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/48271909642.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/tasotuwobegew.pdf
    • https://cdn.shopify.com/s/files/1/0435/9231/9139/files/cdia_metro_2_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/ford_l8000_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/11982698317.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/guminegatawulasij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006029.bin
8d0d37b827090366addee9f0cb4fa7b20053b734566f7ac630cfca5c8f771843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 5336 bytes
font_01_sfnt_off0000724d.bin
f87d2fd5fa3b1800e8bdfe2e9a7d81c62ce159a108bcd227d607593cf1a68396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724D 10244 bytes

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