Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc08b20453107c6…

MALICIOUS

PDF

35.2 KB Created: 2020-08-13 19:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 050e933553264b23096cba521e5cef56 SHA-1: 8c6c9962fcf79e26a5fcebffe7faa55cde8a9da1 SHA-256: 5cc08b20453107c6c8f61e8dd4bd3a955d2971da55356375730f44d6615e9307
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which are algorithmically generated and point to potentially malicious infrastructure. One critical heuristic identified a link to a known malicious redirector, which, when clicked, leads to a URL containing 'korg kaossilator dynamic phrase synthesizer manual'. The document body itself is heavily obfuscated but contains a similar URL. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/wb?keyword=korg%20kaossilator%20dynamic%20phrase%20synthesizer%20manual
    • http://files.helenvitoria.com/uploads/1/3/0/7/130739631/reper_mejilezifapatot_kixojo.pdf
    • http://dezakotat.cornwallamillionactsofsanctuary.com/uploads/1/3/1/6/131637254/labetiribalutagi.pdf
    • http://xetuges.theonechocolate.com/uploads/1/3/1/8/131871390/671edb74.pdf
    • http://files.adventuresatyourdoorstep.com/uploads/1/3/1/4/131406736/jidolunebepuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/anand_vihar_isbt_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/4289379052.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/44434326146.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/10098062557.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/sunozolofaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0476/files/suxutapel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/attendance_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/soal_olimpiade_guru_biologi_sma.pdf
    • https://cdn.shopify.com/s/files/1/0432/8626/6016/files/mixulitabolezugagiwimo.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_off000045fb.bin
74d02d255d214a719b5ab4fde0a215fc4c4d07ea5ac9c28b76cef33d15078c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45FB 5672 bytes
font_01_sfnt_off0000592f.bin
77605b68547e6eff6c1f471bbe5f1c4f568a179c65eb6e7ed4440ef0e59bf1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592F 11004 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.