Malicious PDF — malware analysis report

Static analysis result for SHA-256 963c2b2fc34500df…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 02:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb2ac652c6c106d342e94a8d4e48c12e SHA-1: c6c85b8b5686a91514be94e860da9b232d082184 SHA-256: 963c2b2fc34500dfca66482814909c99f035ea49043666371f6b89cb55cc672b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text referencing 'Minecraft wiki beginners guide' and the malicious URL, suggesting a social engineering lure. The presence of a PDF link farm and a critical ML classification further support the malicious nature of this document. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=minecraft+wiki+beginners+guide
    • http://vuputim.mrtasmania.org/uploads/1/3/0/7/130740596/folunad_magegeketaf_danako.pdf
    • http://files.aurora-patina.com/uploads/1/3/0/7/130776254/kawepabikelu_jixip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/buffer_capacity_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/tufez.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/66433996436.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/9240349041.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/91476193783.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/new_super_mario_bros_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/faure_sicilienne_cello_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0460/7043/1908/files/duzugibul.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/the_octonauts_creature_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/alert_after_form_submit_jquery.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/12892990507.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/chessbase_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/bellbirds_poem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/dental_management_of_cerebral_palsy.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_off000065ab.bin
c56e51e32c650e78223a91d390bcbfc8869d0ad88bf7f5ef854c3382f883f781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 5460 bytes
font_01_sfnt_off0000785e.bin
64cfab9c44861e1466b62e60172eb1c7be6134303747b817afbdf381898af24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785E 9992 bytes

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