Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edd75b9c38288e8…

MALICIOUS

PDF

37.8 KB Created: 2020-08-15 03:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e49440d4c1e740384e665b1db1b484e SHA-1: 47b44545103909b1eabe7188149e09d3123b7ba1 SHA-256: 6edd75b9c38288e835921b60367ad11f42df2254d0b8f9820bbadd01d6bb81f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.com/pify?keyword=missing+addends+worksheets+first+grade', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to educational worksheets, likely a lure to disguise the malicious intent. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=missing+addends+worksheets+first+grade
    • http://files.itselementarymydear.com/uploads/1/3/1/3/131379183/kigot_makonulunurajo_feputikav.pdf
    • http://rowiravox.scarletmarketeer.com/uploads/1/3/2/6/132683014/komuvogaloni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/4474021515.pdf
    • https://cdn.shopify.com/s/files/1/0440/0264/0030/files/aris_gallios_chicago.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/easy_broadway_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/71326194888.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/44099656781.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/fakugikaxubitinagu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/fobizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/benzoato_de_sodio_propiedades.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/58159572527.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/89992166990.pdf
    • https://cdn.shopify.com/s/files/1/0448/0575/0946/files/dsc_pc5010_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/frontline_magazine_march_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/prisms_and_pyramids.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_off00005424.bin
8de11ceb4d49fd21c172ccdfd1ca22fb111cbde6e447c91c782da66ebf54fec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5424 5296 bytes
font_01_sfnt_off0000663e.bin
86d9adfb9517f3c4ee5b7107808081821d3196b5eaee4d5533cc08c11e3e2daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 10636 bytes

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