Malicious PDF — malware analysis report

Static analysis result for SHA-256 6400f6e464b928ef…

MALICIOUS

PDF

51.2 KB Created: 2020-08-19 10:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 780ed76dc8e71ade4322ccd7d08fbbe8 SHA-1: ccc5ff21f53cf9d29f2cec2b42694867cc2bc405 SHA-256: 6400f6e464b928ef0a67089566fdb8afb091c8ee6c55326a2af63b0f9621a497
170 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and a link farm, with a lure for fake invoices or download buttons. The embedded URL https://ttraff.com/pify?keyword=up+b.+ed+online+form+2019+date is a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary goal is to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=up+b.+ed+online+form+2019+date
    • http://dawume.thecaringplace.org/uploads/1/3/2/6/132681352/kigovugo-durifolel-suduredevidu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/debazisuzixut.pdf
    • https://cdn.shopify.com/s/files/1/0451/3821/5066/files/define_economic_environment.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/rogeruwosukuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/47417270459.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/76705757738.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/d_d_dungeonscape.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/36456096042.pdf
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/convert_base64_encoded_string_to_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/cefr_b1_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/way_of_the_long_death.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/innovation_in_the_construction_industry.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/street_fighter_alpha_2_mod_apk.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_off0000886c.bin
dfb4ca5a77b5cbaf9dbdf30c6302f64bb6b16291dadcdf71bc3d97402b716ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886C 5652 bytes
font_01_sfnt_off00009b7d.bin
f1dfe9cfcef98a2620871783994f52fbf1dc8e89d5abc07794c6bbebb072b13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7D 10648 bytes

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