Malicious PDF — malware analysis report

Static analysis result for SHA-256 8118889514d2a307…

MALICIOUS

PDF

37.9 KB Created: 2020-08-16 20:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de1712da2505ee68ee19f52c356fb93f SHA-1: ecf5d44e7f0b007d45d24e17003cc0a2d0c8df08 SHA-256: 8118889514d2a307cfc8fde1c2c765928920d0b3fdd48e1793de0549025514c3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious link, 'https://ttraff.cc/pify?keyword=background+bokeh++free', is flagged as a redirector to malicious infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest an intent to redirect users to malicious sites, potentially for phishing or malware distribution.

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.cc/pify?keyword=background+bokeh++free
    • http://files.actservices.net/uploads/1/3/2/8/132814768/7863281.pdf
    • http://vavuwe.consuelojunderwood.com/uploads/1/3/1/6/131607131/fanodokavepana-vafojikafesok-pitajil.pdf
    • http://pisagonu.mission1040.com/uploads/1/3/1/3/131380284/vatagavoxa_julog_kitepeginufo_radoliz.pdf
    • http://zisum.holtonhomeplace.com/uploads/1/3/0/7/130776485/4d039d44a661e97.pdf
    • http://xesabomu.athensupc.com/uploads/1/3/1/1/131164250/49ddd555f81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/sexesimevigumegik.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/85003630550.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/nubosoxovokujesuzovaxara.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/84979559976.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/financial_audit_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0437/8722/3198/files/73537416946.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9079/files/guvorazazazewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/bofewowafivatutakefijeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/automobile_engineering_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/ccna_study_guide.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_off00005a58.bin
bb796d52085790899df0beeb08fdf63ffed476a56672247cf126a30f0df9d779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A58 5324 bytes
font_01_sfnt_off00006c6d.bin
77e2c220f4adb55b4c17ad330d44fab4de5156afaab6c1022c7de004cad6427a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 8988 bytes

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