Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de9d25d345b71d6…

MALICIOUS

PDF

45.7 KB Created: 2020-08-07 00:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f369e907b576e7bf237a45a87af34e3 SHA-1: 33711fe3102f69239a249f6f26a9ff75aedbf66e SHA-256: 9de9d25d345b71d6598a713f5620b597ab0acc76f2fda244fc92e4ab91032b0f
152 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a file conversion tool. The document body and heuristics indicate a lure to a URL hosted on ttraff.com, which is known for malicious redirection. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs suggest a phishing or scam attempt.

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=transformar+arquivo+de+autocad+em+pdf
    • http://nevepafa.gatewaytotrade.com/uploads/1/3/1/0/131071157/fadb945f7.pdf
    • http://files.alamodekabashsewingshop.com/uploads/1/3/0/7/130738822/5100838.pdf
    • http://files.glowmedspacc.com/uploads/1/3/0/7/130740298/32b2eafea29052.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/jotisebizob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/bubujuxesotupulutebix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/23166863443.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6086/files/lepurudilaboratukiwefol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/dosiniselu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/winanokawakixapinimima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/supekeronidosimaxoluri.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1695/files/allegorie_de_la_caverne_de_platon.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/67624689135.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/zoraxebovoniwiritorok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/xafasemales.pdf
    • https://cdn.shopify.com/s/files/1/0434/0098/6787/files/mugixurobojaporevego.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/gokomojolobufozojuguleti.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/factors_affecting_anaerobic_digestion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006120.bin
432d22f117762e0ec06fd4fc7c9499577056bedc2acd2f05fbae598c26fbbf4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5284 bytes
font_01_sfnt_off00007301.bin
03b7388442d3d81690a224b0f7ee7d15077821368258633da187b85472ebb918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 12556 bytes
font_02_sfnt_off0000999d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999D 4324 bytes

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