Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea1a4c6c69f6d33…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 06:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf35c8aa7d6498443f7672c1c49df011 SHA-1: 27d8321000c2be3db675ae39299d459dbe2aecae SHA-256: bea1a4c6c69f6d33900f2e01820d123b927d3e34028b7e40a6cd10406f3393b2
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'https://ttraff.com/pify?keyword=dax+guide+pdf'. This indicates the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

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=dax+guide+pdf
    • http://files.uciaga.org/uploads/1/3/1/4/131408502/5400012.pdf
    • http://files.thetraveleducator.com/uploads/1/3/2/7/132740408/fazipo_pewif_juvoza_fiwalotewizofud.pdf
    • http://files.markbowersart.com/uploads/1/3/0/7/130776266/sakozijureruv.pdf
    • https://cdn.shopify.com/s/files/1/0440/8449/4488/files/repiladupas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/fukuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/8294/4405/files/blank_tab_sheet_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/koxajoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/architecture_residential_drafting_and_design_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/83160271576.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/graphic_designer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/45328644815.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/biblia_dios_habla_hoy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/activity_books_for_5_6_year_olds.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_off00005e69.bin
47668db1e34275552c6c7cd7647b8cbd2545daf3dcb511355c818d24be96db4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 4972 bytes
font_01_sfnt_off00006f71.bin
18b979281c06c44b7f36ce2b73dc294e2120f531e646691ba25d1a6a1218880d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 10816 bytes