Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd7010318d7d540…

MALICIOUS

PDF

49.9 KB Created: 2020-08-19 00:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4efdfaba01cf7a066395b53c7777eb1 SHA-1: 4ac8a608aefbaf496b18f1dac6e3d21817a6a2fe SHA-256: 4fd7010318d7d54087245667102b9c36def14b7116342acae3a0ba10a62ddcf1
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'August month current affairs 2019 pdf adda247' and also lists the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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=august+month+current+affairs+2019+pdf+adda247
    • http://xaziwiw.mrbeckersclass.com/uploads/1/3/2/8/132816066/tasuvev-tetigakevulas.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/69409589854.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/esl_direct_and_indirect_questions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/xezodenapisufawosifuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/tipubelifapizodal.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/tofujunojijeli.pdf
    • https://cdn.shopify.com/s/files/1/0432/2666/1023/files/free_clicker_heroes_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/midland_xtra_talk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/faneliviripu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/napukozibaxotijuwozud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dba.bin
1f97c2e4e6aa877d6ab073f560c6496d20c84d12dae7933b0db08772ca001b17
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 6176 bytes
font_01_sfnt_off00008295.bin
a7b9f8ff66223928b3cd0265e022bcd1991e6dcaaf8fcfda43731f7050bbf951
pdf-font-stream PDF embedded font (sfnt) at offset 0x8295 10096 bytes
font_02_sfnt_off0000a55c.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA55C 16164 bytes