Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dd747ecb23673f…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 23:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7df1dcafdbae826d31b6e9a3bb3a8b0 SHA-1: 62fc880df0f0c1a8ef7dca5730b0bd83b09bb9d2 SHA-256: d6dd747ecb23673fa28f5e52ab59998e98307dd8ba7988f3740adeb609b83d3f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, includes this URL and a list of other URLs hosted on 'cdn.shopify.com' and various other domains, suggesting a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=belfast+city+airport+departures+information
    • http://zuxumomup.diplomainprofessionalstudies.com/uploads/1/3/2/6/132680981/zoleve.pdf
    • http://fumoz.emaginedthis.com/uploads/1/3/2/7/132710507/maxusu.pdf
    • http://files.madiesfinds.com/uploads/1/3/0/9/130968996/pesiborokitovuxabidi.pdf
    • http://files.northshorepines.com/uploads/1/3/0/7/130775084/moxifuwopupusoraxik.pdf
    • http://files.generationrestaurantsupply.com/uploads/1/3/0/7/130740292/4149095.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/godapuzut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/wivebonamugixataxesesusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/brad_keller_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/digej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/facebook_mobile_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/coin_crown_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/bixuzagigomitofaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/vebamubugin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/18601275484.pdf
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/simplification_and_approximation_questions_for_bank_po_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ff.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FF 6440 bytes
font_01_sfnt_off000065f5.bin
b3727ca620b31180a23f061d80628d9236ed7cb2d14e251f37bbf97653180daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 5452 bytes
font_02_sfnt_off00007866.bin
37fdf3fa458b1051d2bac1c964a27d982834aa76b71989ae0bc4a1e47d6f1cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 10172 bytes
font_03_sfnt_off00009b77.bin
333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B77 16148 bytes

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