Malicious PDF — malware analysis report

Static analysis result for SHA-256 616efc854b9b3fc1…

MALICIOUS

PDF

41.5 KB Created: 2020-08-27 19:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f49c04059621cf151d0748e3dceaf02 SHA-1: 6038ec87770c7aa1127fd0e65b7c929a227aa6e6 SHA-256: 616efc854b9b3fc19693753c1aca889d1dace2747afd1bd83d8128f804f1e1fd
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a download for an 'agario bot extension'. The ML classifier strongly indicates maliciousness. The embedded URLs suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/pify?keyword=agario+bot+extension
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • http://files.samedaycreativesolutions.com/uploads/1/3/1/8/131856476/saxupawusekuf.pdf
    • http://files.stbarnabaschurchcroslandmoor.org/uploads/1/3/0/7/130775310/4488145.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/80066629822.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/giwax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/scotts_speedy_green_1000.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/vakovupovagafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/22385446184.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/24119665219.pdf
    • https://cdn.shopify.com/s/files/1/0453/5510/6459/files/69608347230.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/88245300740.pdf
    • https://cdn.shopify.com/s/files/1/0431/7590/3383/files/jyu-_oh-_sei.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_off00005ced.bin
85ad8498b34d043d1aeac65f063d04515ad02c50be0ef2b6d0dc501b87519bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CED 5020 bytes
font_01_sfnt_off00006e0c.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 1800 bytes
font_02_sfnt_off00007699.bin
6b4cc79a9e9dae56a30a9f4e50a5943fa3a852b2e00cd7ee9f930cd3748dafbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 10112 bytes