Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9663bf8febfbaaf…

MALICIOUS

PDF

48.1 KB Created: 2020-09-02 15:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1cf72496c2241ccc678e57f5a525b76 SHA-1: a1e56fe09893abd11fca9dc1ee30cde678f4a8d1 SHA-256: b9663bf8febfbaaf9883758dfcbb51f0038e9f7fc96c873946d38ac51f5a4ac5
152 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a malicious redirector, disguised as a game guide. The document body, though heavily obfuscated, contains references to 'Diablo 3 season 18 start guide' and the malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent.

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.me/wix?keyword=diablo+3+season+18+start+guide
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/cheppave_chirugali_movie_songs_audio.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/nopubuwobavunedadinaj.pdf
    • https://cdn.shopify.com/s/files/1/0463/0645/9808/files/96423566400.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0714/files/mipulumigedativev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/adventure_of_a_lifetime_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/michelin_star_guide_2019_usa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/gubazosipatumedewaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/9718/4673/files/free_airtel_internet_settings.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/xisojezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/tufuzaguwozezutup.pdf
    • https://static.usrfiles.com/ugd/275374_7075d1abe7e74b1f981e8d12f0492255.pdf
    • https://static.usrfiles.com/ugd/3e9e83_7d5c0815d0c04a808c531527e8b99b88.pdf
    • https://static.usrfiles.com/ugd/06497e_7bce777fb60a4a53ac6b5842dc89f692.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/37135638388.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/icloud_photos_all_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/wesogoboma.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_off00007cdc.bin
42395741b14d9db87527efea04e2518e40c89c93806c2a0e4a61f473b33bf7a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDC 5544 bytes
font_01_sfnt_off00008fc9.bin
c892f893447c014695d240feda0a7f0215ec66b8f3c6b524680b8f2bad14e75b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC9 10372 bytes