Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa206f16e848636…

MALICIOUS

PDF

33.8 KB Created: 2020-08-27 12:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1212e58fc9767238fceee0e462ce945e SHA-1: 3c3ce1545a0dd1399aa13acf9c050204f46497cc SHA-256: 6aa206f16e8486362396a83dea9b425083a1156c34dfa440a5afec2919c07b15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector service, indicating an attempt to lure users to potentially harmful content. 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.cc/pify?keyword=horizons+6th+edition
    • http://files.cassatastreats.com/uploads/1/3/0/7/130775228/a516620336.pdf
    • http://files.ctai.ie/uploads/1/3/0/7/130775306/9409589.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/7792/6811/files/banjara_dj_naa_songs_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/pimosikezolalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/47236433206.pdf
    • https://cdn.shopify.com/s/files/1/0463/6786/7035/files/fejudujiwalud.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/properties_of_aluminum_alloys.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/auto_accident_report_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/pifevaxolexobefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/17877447672.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/dedefoduruwilidoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/kagafemowezis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/pharmacology_books_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.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_off00004838.bin
e888a007df0a5602a312e06ce2b0d32b5ead30db772ec94ca64c658322fc5a20
pdf-font-stream PDF embedded font (sfnt) at offset 0x4838 4836 bytes
font_01_sfnt_off0000589a.bin
ad65271d9642afec31dc298383d2071445c74ffbb15e32a1dabd04d23a62f39f
pdf-font-stream PDF embedded font (sfnt) at offset 0x589A 9948 bytes