Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f4034f3b868b96…

MALICIOUS

PDF

84.5 KB Created: 2020-08-11 09:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22583a38d38ce2e52862258e050dbca1 SHA-1: 6ec41451c22a0ea61a22a6e68318faf3b1ce2834 SHA-256: 76f4034f3b868b9642bf680893fdba17bcfea557ca4d9c1c388fed83b39370de
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=obligations+and+contracts+notes+pdf', suggesting a lure to a phishing or scam page. The presence of numerous links and the malicious redirector indicate a link farm or redirection attack.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • 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=obligations+and+contracts+notes+pdf
    • http://files.jmurowing.com/uploads/1/3/1/4/131437157/3fdc3.pdf
    • http://xowiv.charliethorn.org/uploads/1/3/1/4/131408159/2553013.pdf
    • http://files.kennickbuilders.com/uploads/1/3/2/6/132682204/2495581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7495/3124/files/how_do_i_reset_my_bluetooth_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/51298430029.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/kamizenojimewinibor.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/marekita.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/44113435172.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/21453725882.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/22275162597.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/87180165979.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/85970603085.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/10822702877.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/rephrasing_sentences_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/bukufozafuninivagum.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_off00010487.bin
a14ecffe4289866ab638703c857bfada64c14260d8d1f88d1e092f1f6b087429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 5492 bytes
font_01_sfnt_off00011731.bin
b4c6be11ff2c84abd9778e360e6b15db67493ebdd09a0d7240dcd00ed72327d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 14620 bytes

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