Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8c51ff8c7de260…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 14:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fcb971c68b99d0c31994b298448789d SHA-1: ec0932754a989e08a91794f1d97fb4b9c737225c SHA-256: 9e8c51ff8c7de2601feec82ffe634e05e20cf3ef331579888a514fdd5e5e9a33
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/pify?keyword=java+web+project'. This indicates a likely attempt to lure users to a malicious site. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm designed to obscure the final malicious destination. No scripts were extracted, but the presence of these link farms and the malicious redirector strongly suggests a phishing or malware distribution 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=java+web+project
    • http://zivofa.camarillocommunitygardens.org/uploads/1/3/2/7/132710700/dimeg.pdf
    • http://files.lesniaklab.com/uploads/1/3/0/7/130775115/natimifojisaguzijili.pdf
    • http://files.abrandex-design.com/uploads/1/3/0/7/130739490/7461733.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/javesezirirezirexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/guia_de_ejercicios_de_calistenia.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/avadhuta_gita_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/close_corporation_act_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/jegodanafuzedavagikalov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/41731715257.pdf
    • https://cdn.shopify.com/s/files/1/0451/2792/5925/files/bhagavad_gita_download_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/delemuginanowufimugofuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/65682095301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/54947876609.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0625/files/sisafimona.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/xevigufefowulabavafepe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1c.bin
cd93b2883ab7036d7ca2059050faee5a3a7f980b5705c22b93fe5f7c72bac0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 5076 bytes
font_01_sfnt_off00007d86.bin
a5e51cca70212e49e093ba495d2225bb1ce7a952da969dfd19db65b072b908f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 11008 bytes

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