Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa609604f40adb5…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 18:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3053bb8d3d4276c49a03e2df62b66c9 SHA-1: bb2895ba74ba893380dbee0c88dd99e3e821d80b SHA-256: 9aa609604f40adb53aeb186e64c2021c216e671c1fba078a99f253b2c717c1de
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links, with a primary malicious redirector identified at https://ttraff.cc/pify?keyword=augustine+city+of+god+pdf. This suggests the document's purpose is to lure users to malicious sites. 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.cc/pify?keyword=augustine+city+of+god+pdf
    • http://donomaji.allpowernationals.com/uploads/1/3/1/6/131607600/b4f02.pdf
    • http://files.sallyrogersdavidson.com/uploads/1/3/1/3/131383613/nokisexuwusizux.pdf
    • http://files.brothernature.us/uploads/1/3/0/8/130814393/9a13d.pdf
    • http://files.catherinecarterpainting.com/uploads/1/3/2/8/132814024/8354092.pdf
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/tovasinujilonikazago.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/menarilipokif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/westgate_travel_club.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/gorolasivor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/8134798297.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/ralupovel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/ritogun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/ttd_calendar_2020_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/mosagemajumebizuki.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/5478075601.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_off000065d2.bin
52608cab14868cc8e064f054f010a04c1d02068e21f022bad2292a359310eac3
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 5076 bytes
font_01_sfnt_off0000774a.bin
2422d2b407b775ef0840045ad87c287448928ad3634a02bb1ca5105937ae9fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x774A 15196 bytes